The 'Gone Girl' has returned to the spotlight!

Actress Rosamund Pike, 35, debuted her post-baby body on Sunday Jan. 4 — and the new mom looks absolutely amazing!

Rosamund — who played the mysterious Amy Elliott-Dunne alongside Ben Affleck in the hit thriller — stepped out for the first time since welcoming her second son on Dec. 2, 2014 at Variety's Creative Impact Awards in Palm Springs, Calif.

rosamund pike post-baby body
Getty

Rosamund on Sunday, Jan. 4, 2014.

For the occasion, during which she won the Breakthrough Performance for her role in 'Gone Girl,' the British star donned an Alexander McQueen silk floral jacquard dress and a pair of Brian Atwood's "Melly" sandals.

Related Story: Hilaria Baldwin is Pregnant, Expecting Baby No. 2 With Alec Baldwin!

Rosamund gave birth to her second child, whose named has not yet been released, at her home in early December. She is also a mom to a two-year-old son, Solo, with her longtime boyfriend, Robie Uniacke, 53.