Newly single Jessica Biel hits the town

Jessica Biel was all smiles during her first night out since  calling it quits with Justin Timberlake.

Biel, who just last week confirmed her split from her longtime boyfriend, threw a 20th-birthday bash for her younger brother (also named Justin) at Cafe Entourage in Hollywood on Saturday night.

“Biel seemed in great spirits,” a source told us about the actress, who rocked a brown leather jacket, white tee, wide-leg jeans and long feather earrings.

Biel & co. arrived at the restaurant at 8:30 p.m. and stayed until around 11:30. She drank martinis and chowed down on a sandwich, according to our spy.

After dinner, the crew “continued partying into the evening,” the source said.