"Mad Men" Season 4 Premiere

Actor Jon Hamm arrives to the Season 4 premiere of AMC's "Mad Men" on July 20, 2010, in Los Angeles.

Pictures: Jon Hamm

Actress Christina Hendricks arrives to the Season 4 premiere of AMC's "Mad Men" on July 20, 2010, in Los Angeles.

Actress Elisabeth Moss arrives to the Season 4 premiere of AMC's "Mad Men" on July 20, 2010, in Los Angeles.

Pictures: Elisabeth Moss

Actress Cara Buono arrives to the Season 4 premiere of AMC's "Mad Men" on July 20, 2010, in Los Angeles.

Actor Vincent Karthieser arrives to the Season 4 premiere of AMC's "Mad Men" on July 20, 2010, in Los Angeles.

Actor Mark Moses arrives to the Season 4 premiere of AMC's "Mad Men" on July 20, 2010, in Los Angeles.

Actress Kiernan Shipka arrives to the Season 4 premiere of AMC's "Mad Men" on July 20, 2010, in Hollywood, Calif.

Actor Jared Gilmore arrives to the Season 4 premiere of AMC's "Mad Men" on July 20, 2010, in Los Angeles.

Christina Hendricks arrives at the premiere of "Mad Men" Season 4 on Tuesday, July 20, 2010, at The Mann 6 Theater in Los Angeles.

Actor Aaron Paul arrives to the Season 4 premiere of AMC's "Mad Men" on July 20, 2010, in Los Angeles.

Actor Christopher Stanley and his wife, Kim Stanley, arrive to the Season 4 premiere of AMC's "Mad Men" on July 20, 2010, in Los Angeles.

Actor Jared Harris arrives to the Season 4 premiere of AMC's "Mad Men" on July 20, 2010, in Los Angeles.

Actor Aaron Staton arrives to the Season 4 premiere of AMC's "Mad Men" on July 20, 2010, in Los Angeles.

Actress Betsy Brandt and actor RJ Mitte arrive to the Season 4 premiere of AMC's "Mad Men" on July 20, 2010, in Los Angeles.

Elizabeth Moss arrives at the premiere of "Mad Men" Season 4 on Tuesday July 20, 2010, at The Mann 6 Theater in Los Angeles.

Pictures: Elisabeth Moss

Virginia Donohoe and actor Rich Sommer arrive to the Season 4 premiere of AMC's "Mad Men" on July 20, 2010, in Los Angeles.

Actress Deborah Lacey arrives to the Season 4 premiere of AMC's "Mad Men" on July 20, 2010, in Los Angeles.

Actress Alexis Stier arrives to the Season 4 premiere of AMC's "Mad Men" on July 20, 2010, in Los Angeles.

Actor Jon Hamm, left, and creator Matthew Weiner arrive at the premiere of "Mad Men" Season 4 on Tuesday, July 20, 2010, at The Mann 6 Theater in Los Angeles.

Pictures: Jon Hamm

Jane Bryant arrives at the premiere of "Mad Men" Season 4 on Tuesday July 20, 2010, at The Mann 6 Theater in Los Angeles.

From left, Jon Hamm, Jane Bryant, and Matthew Weiner pose together at the premiere of "Mad Men" Season 4 on Tuesday July 20, 2010, at The Mann 6 Theater in Los Angeles.

Pictures: Jon Hamm

Jon Hamm, at left, and Jennifer Westfeldt arrive at the premiere of "Mad Men" Season 4 on Tuesday, July 20, 2010, at The Mann 6 Theater in Los Angeles.

Pictures: Jon Hamm