January 05, 2015 11:00 AM

This Gone Girl is back — and better than ever.

A short four weeks (yes, you read that right!) after giving birth to her second son, actress Rosamund Pike looked radiant as she arrived at the 26th annual Palm Springs International Film Festival in California on Saturday.

Pike, 35, paired a floral print trapeze frock from Alexander McQueen with Brian Atwood‘s Melly strappy stilettos and a rosy red lip.

The new mama — who welcomed her baby boy at home on Dec. 2 — and her longtime love Robie Uniacke are also parents to 2½-year-old son Solo.

David Livingston/Getty

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