"The Avengers" premieres

Actor Robert Downey Jr. attends "The Avengers" premiere during the closing night of the Tribeca Film Festival on April 28, 2012, in New York.

Actress Cobie Smulders attends "The Avengers" premiere during the closing night of the Tribeca Film Festival on April 28, 2012, in New York.

Actor Chris Hemsworth attends the premiere of "The Avengers" during the 2012 Tribeca Film Festival on Saturday, April 28, 2012, in New York.

Tribeca Film Festival co-founder Robert De Niro and actor Robert Downey Jr. attend "The Avengers" premiere during the 2012 Tribeca Film Festival on April 28, 2012, in New York.

Miss USA Alyssa Campanella and Miss Universe Leila Lopes attend "The Avengers" premiere during the 2012 Tribeca Film Festival on April 28, 2012, in New York.

Actor Mark Ruffalo, center, poses with members of the U.S. Military before the premiere of "The Avengers" during the 2012 Tribeca Film Festival on April 28, 2012, in New York.

Actor Tom Hiddleston attends "The Avengers" premiere during the 2012 Tribeca Film Festival on April 28, 2012, in New York.

Actors Michael J. Fox and his wife, actress Tracy Pollan, attend the premiere of "The Avengers" premiereduring the 2012 Tribeca Film Festival on April 28, 2012, in New York.

Actors Jennifer Grey and Clark Gregg attend "The Avengers" premiere during the 2012 Tribeca Film Festival on April 28, 2012, in New York.

Actor Mark Ruffalo attends "The Avengers" premiere during the 2012 Tribeca Film Festival on April 28, 2012, in New York.

Singer Jimmy Buffett, right, and his son, Cameron,l attend the premiere of "The Avengers" during the 2012 Tribeca Film Festival on April 28, 2012, in New York.

Actor Robert Downey Jr., center, attends "The Avengers" premiere during the closing night of the Tribeca Film Festival on April 28, 2012, in New York.

Actress Cobie Smulders, second left, attends "The Avengers" premiere during the 2012 Tribeca Film Festival on April 28, 2012, in New York.

Actor Chris Hemsworth, center, attends "The Avengers" premiere during closing night of the Tribeca Film Festival on April 28, 2012, in New York.

Actor Robert Downey Jr arrives for the European premiere of "Marvel Avengers Assemble," as the movie is known in the UK, at a west London cinema, April 19, 2012. The movie premiered as "The Avengers" in Los Angeles last week and will hit U.S. theaters on May 4.

Australian actor Chris Hemsworth and wife, Elsa Pataky, arrive for the European premiere of "Marvel Avengers Assemble," at a west London cinema, April 19, 2012.

Actor Jeremy Renner arrives for the European premiere of "Marvel Avengers Assemble," at a west London cinema, April 19, 2012.

Actress Scarlett Johansson arrives for the European premiere of "Marvel Avengers Assemble," at a west London cinema, April 19, 2012.

Actor Mark Ruffalo arrives for the European premiere of "Marvel Avengers Assemble," at a west London cinema, April 19, 2012.

British actor Tom Hiddleston arrives for the European premiere of "Marvel Avengers Assemble," at a west London cinema, April 19, 2012.

Actress Cobie Smulders attends the "Marvel Avengers Assemble" European premiere at Vue Westfield on April 19, 2012, in London.

Actress Aisha Tyler attends the premiere of "The Avengers" held at the El Capitan Theatre on April 11, 2012, in Hollywood, Calif.

Stellan Skarsgard, left, and Alexander Skarsgard attend the premiere of "The Avengers" held at the El Capitan Theatre on April 11, 2012, in Hollywood, Calif.

Actor Alexander Skarsgard attends the premiere of Marvel Studios' "Marvel's The Avengers" held at the El Capitan Theatre on April 11, 2012, in Hollywood, Calif.

Stellan Skarsgard attends the premiere of "The Avengers" held at the El Capitan Theatre on April 11, 2012, in Hollywood, Calif.

Scarlett Johansson attends the premiere of "The Avengers" held at the El Capitan Theatre on April 11, 2012, in Hollywood, Calif.

Chris Evans attends the premiere of "The Avengers" held at the El Capitan Theatre on April 11, 2012, in Hollywood, Calif.

From left, actors Mark Ruffalo, Chris Hemsworth and Scarlett Johansson attend the premiere of "The Avengers" held at the El Capitan Theatre on April 11, 2012, in Hollywood, Calif.

Jeremy Renner attends the premiere of "The Avengers" held at the El Capitan Theatre on April 11, 2012, in Hollywood, Calif.

Hal Sparks attends the premiere of "The Avengers" held at the El Capitan Theatre on April 11, 2012, in Hollywood, Calif.

Chris Evans, left, and Samuel L. Jackson attend the premiere of "The Avengers" held at the El Capitan Theatre on April 11, 2012, in Hollywood, Calif.

Robert Downey Jr., left, and Chris Hemsworth attend the premiere of Marvel Studios' "The Avengers" held at the El Capitan Theatre on April 11, 2012, in Hollywood, Calif.

Cobie Smulders, left, and Scarlett Johansson attend the premiere of "The Avengers" held at the El Capitan Theatre on April 11, 2012, in Hollywood, Calif.

Jeremy Renner, left, and Samuel L. Jackson attend the premiere of "The Avengers" held at the El Capitan Theatre on April 11, 2012, in Hollywood, Calif.

Actors Scarlett Johansson, left, and Jeremy Renner attend the premiere of "The Avengers" held at the El Capitan Theatre on April 11, 2012, in Hollywood, Calif.

From left, actors Chris Hemsworth, Chris Evans and Scarlett Johansson attend the premiere of Marvel Studios' "Marvel's The Avengers" held at the El Capitan Theatre on April 11, 2012, in Hollywood, Calif.

The cast and crew of "The Avengers" attend the film's premiere at the El Capitan Theatre on April 11, 2012, in Hollywood, Calif.

Actor Samuel L. Jackson arrives at the premiere of "The Avengers" at the El Capitan Theatre on April 11, 2012 in Hollywood, Calif.

Actress Scarlett Johansson arrives at the premiere of "The Avengers" at the El Capitan Theatre on April 11, 2012, in Hollywood, Calif.

Sunrise Coigney, left, and actor Mark Ruffalo arrive at the premiere of "The Avengers" at the El Capitan Theatre on April 11, 2012, in Hollywood, Calif.

Chris Hemsworth arrives at the premiere of "The Avengers" at the El Capitan Theatre on April 11, 2012, in Hollywood, Calif.

Actor Damian McGinty arrives at the premiere of "The Avengers" at the El Capitan Theatre on April 11, 2012, in Hollywood, Calif.

Robert Downey Jr., left, and Susan Downey arrive at the premiere of "The Avengers" at the El Capitan Theatre on April 11, 2012, in Hollywood, Calif.

Actor Mark Ruffalo, right, and Sunrise Coigney arrive at the the world premiere of "The Avengers", at the El Capitan Theatre in Hollywood, Calif., April 11, 2012.

TV personality Audrina Patridge arrives at the premiere of "The Avengers" at the El Capitan Theatre on April 11, 2012, in Hollywood, Calif.

Actress Scarlet Johansson arrives at the the world premiere of Marvel's "The Avengers" at the El Capitan Theatre in Hollywood, Calif., April 11, 2012.

Chris Evans arrives for the the world premiere of "The Avengers" at the El Capitan Theatre in Hollywood, Calif., April 11, 2012.

Actors Clark Gregg, left, and Jennifer Grey arrive at the premiere of "The Avengers" at the El Capitan Theatre on April 11, 2012, in Hollywood, Calif.

Actor Seth Green arrives at the premiere of "The Avengers" at the El Capitan Theatre on April 11, 2012, in Hollywood, Calif.

Actor Robert Downey Jr., left, and wife Susan Downey arrive at the premiere of "The Avengers" at the El Capitan Theatre on April 11, 2012, in Hollywood, Calif.

Actor/comedian Hal Sparks arrives at the premiere of "The Avengers" at the El Capitan Theatre on April 11, 2012, in Hollywood, Calif.

Actress Scarlett Johansson arrives at the premiere of "The Avengers" at the El Capitan Theatre on April 11, 2012, in Hollywood, Calif.

Actor Tom Hiddleston arrives at the premiere of "The Avengers" at the El Capitan Theatre on April 11, 2012, in Hollywood, Calif.

Actor Chris Hemsworth arrives at the premiere of "The Avengers" at the El Capitan Theatre on April 11, 2012, in Hollywood, Calif.

Actor Samuel L. Jackson arrives at the premiere of "The Avengers" at the El Capitan Theatre on April 11, 2012, in Hollywood, Calif.

Actor Chris Evans arrives at the premiere of "The Avengers" at the El Capitan Theatre on April 11, 2012, in Hollywood, Calif.

Actress Debby Ryan arrives at the premiere of "The Avengers" at the El Capitan Theatre on April 11, 2012, in Hollywood, Calif.

Actress Cobie Smulders arrives at the premiere of "The Avengers" at the El Capitan Theatre on April 11, 2012, in Hollywood, Calif.

Actress Francia Raisa arrives at the premiere of "The Avengers" at the El Capitan Theatre on April 11, 2012, in Hollywood, Calif.

From left, director Joss Whedon, actors Clark Gregg, Tom Hiddleston, Mark Ruffalo, Chris Hemsworth, Chris Evans, Scarlett Johansson, Jeremy Renner, Samuel L. Jackson, Stellan Skarsgard, Cobie Smulders and Marvel Studios President of Production Kevin Feige attend the premiere of "The Avengers" held at the El Capitan Theatre on April 11, 2012, in Hollywood, Calif.

Actor Dominic Monaghan arrives at the premiere of "The Avengers" at the El Capitan Theatre on April 11, 2012, in Hollywood, Calif.

Actor Damian McGinty arrives at the premiere of "The Avengers" at the El Capitan Theatre on April 11, 2012, in Hollywood, Calif.

The cast and crew of "The Avengers" attend the film's premiere held at the El Capitan Theatre on April 11, 2012, in Hollywood, Calif.