Seth Rogen & Barbara Streisand Premiere “The Guilt Trip” in Los Angeles

Posted Wednesday December 12, 2012 1:15 PM GMT

Stepping out for a promotional appearance, Seth Rogen and Barbara Streisand showed up at the big Hollywood premiere of their new flick “The Guilt Trip” last night (December 11).

The “Knocked Up” stud and his legendary Tinseltown costar looked to be having a marvelous time as they hammed it up for the paparazzi outside the Regency Village Theatre in Westwood.

Meanwhile, Josh Brolin also turned out for the affair, joined by his lovely wife Diane Lane and his father James Brolin.

Slated to hit theaters on December 19th, “The Guilt Trip” is about inventor Andy Brewster, who is about to embark on the road trip of a lifetime. But when he makes a quick stop at his mom’s house, it turns into an unexpected cross-country voyage with her along for the ride.

Photo Credit: Getty Images