Jessica Biel skipped the April 16 premiere of her film Bleeding Heart to care for her son Silas. Credit: Mike Coppola/Getty Images for Tiffany & Co.

A valid excuse! Jessica Biel has only been a mom for a little more than a week and already she's putting her infant son first. According to Page Six, Justin Timberlake's wife, 33, skipped the Tribeca Film Festival premiere of her film Bleeding Heart to care for her son Silas on Thursday, April 16. 

Ironically, the event was at the School of Visual Arts' Silas Theatre in NYC, which director Diane Bell joked was a "good omen." 

Bleeding Heart also features Girls star Zosia Mamet, Scandal actress Kate Burton, and Across the Universe actor Joe Anderson

"Jessica sees herself as a mom of boys, so it worked out perfectly," a source told Us Weekly of the new mother. "Justin is so excited, he doesn't know what to do with himself!" 

The couple plans to raise their son in Montana "out of the spotlight."