Toni Collette

Actress Toni Collette arrives at the 16th Annual Screen Actors Guild Awards on Jan. 23, 2010, in Los Angeles. Collette is nominated as Outstanding Lead Actress in a Comedy Series at the 2010 Primetime Emmys for her work on Showtime's "United States of Tara." She won the award in 2009.

Actress Toni Collette arrives on the red carpet at the Tropfest 2010 short film festival on Feb. 21, 2010, in Sydney.

Toni Collette poses with the award for best actress in a television series comedy or musical for "United States of Tara" backstage at the 67th Annual Golden Globe Awards on Sunday, Jan. 17, 2010, in Beverly Hills, Calif.

"United States Of Tara" star Toni Collette accepts the award for best actress in a comedy series at the 61st Primetime Emmy Awards on Sunday, Sept. 20, 2009, in Los Angeles.

Toni Collette arrives at the CBS/CW/Showtime Summer press tour party in San Marino, Calif., on Monday, Aug. 3, 2009.

On "The United States of Tara," Toni Collette plays Tara, a housewife with dissociative identity disorder. Her alternate personalities include a flirty teenager, an old-fashioned housewife and a male, beer-drinking Vietnam veteran.

Australian actress Toni Collette arrives at the BRIT Music Awards in London on Feb. 14, 2007. In addition to Collette's acting career, she is also a musician. She fronts a band called Toni Collette & The Finish.

Toni Collette, left, and Greg Kinnear pose together at the New York premiere of their new film "Little Miss Sunshine" on Tuesday, July 25, 2006. Originally from Australia, Collette began her career in the early 1990s. Her film credits include "Muriel's Wedding," "In Her Shoes" and "The Sixth Sense."

Greg Kinnear, Steve Carell, Paul Dano, Toni Collette, Abigail Breslin in the 2006 film "Little Miss Sunshine." The film, in which Collette plays an overworked mother of two children, was nominated for Best Picture at the 2007 Academy Awards.

Co-stars Cameron Diaz, right, and Toni Collette arrive for the premiere of "In Her Shoes" in London on Monday Nov. 7, 2005.

Actress Toni Collette arrives for the film premiere of their movie "In Her Shoes" at the Empire cinema in London on Nov. 7, 2005. The Emmy-nominated actress has been married to Dave Galafassi since 2003, and gave birth to her first child, Sage Florence, on Jan. 9, 2008.