Lily Collins & Zac Efron: Happy Birthday, Chris Reinacher!

Lily Collins keeps it cute after leaving dinner with Zac Efron at STK restaurant in Los Angeles on Saturday night (February 4).

The pair celebrated the 24th birthday of Zac‘s childhood friend, Chris Reinacher, from the comedy sketch group The Wait List.

“He’s the funniest guy I know,” Zac shared of Chris – the two have been friends since the first grade.

Afterward, the twosome continued the celebration at Lexington Social House, where they joined Miley Cyrus (with boyfriend Liam Hemsworth), Rumer Willis, Ryan Rottman, and Ben Barnes.

More pics at X17!