Taylor Lautner, "Tracers" star, is enjoying being 21. Marie Avgeropoulos' hot boyfriend hung out with Patrick Schwarzenegger, partying reportedly during a boys night out.

According to JustJared, both "Grown Ups 2" stars went to the Pearl Liquor Bar on West Hollywood's Sunset Strip on Friday for a boys night out.

[For photos, click HERE.]

Cameras caught the fast friends and co-stars leaving the venue and getting into a car. The sighting came just days before Schwarzenegger posted a photo of his intense workout session with his trainer and a few buddies on Twitter.

[For Schwarzenegger's workout photo showing off his toned arms, click HERE.]

As for Lautner, he has been busy shooting "Tracers" and hanging out with his new love, Avgeropoulos, 27. For our first story on Lautner's romance, click HERE.

The "Twilight" actor is extremely excited about his new romance with the brunette beauty, according to Hollywood Life.

The twosome are looking cozy these days on-and-off set. Romance rumors began flying that the cute pair were more than friends after cameras caught them at a Fourth of July party in New York City, HL reported.

"[Avgeropoules is] totally his type and [Lautner is] really excited about her," a source told HL early this summer.

However, just as quickly as things are heating up, they might cool down even quicker, the source told the celebrity news site.

"Taylor's having a great time with Marie," the source continued. "But I doubt it will last after they finish the movie. My guess is that this will be a fun summer fling for Taylor because his number one priority is his career. He is extremely driven and ambitious and wants to become the biggest action star in the world."

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