The stars of HBO's Entourage hit Mastro's Steakhouse in Beverly Hills Tuesday night only hours after they filmed the last scenes ever of the series.

The show's eighth and final season debuts July 24.

At the restaurant were Adrian Grenier, Jeremy Piven, Jerry Ferra, Carla Gugino, Camilla Belle, Steve Harvey, Vince Vaughn, Beverly D'Angelo and Scott Caan.

The stars took to Twitter to mourn the show. Grenier wrote, "I don't know what I'll miss more, the laughs or the love." Ferrara Tweeted: "It has been the time of my life."

Too sweet! We'll miss you, guys! Check out all the pics from the party in our gallery below ... including a photo of slimmed-down Jerry's hot new girlfriend!

Celebs flocked out for STK restaurant's third anniversary party in West Hollywood Tuesday night. Kristin Cavallari and fiance Jay Cutler were there, along with Scott Caan and the boys of Entourage; Adrian Grenier (with girlfriend Emmily Caldwell), Kevin Connolly and Jerry Ferrara.

Entourage is coming up on its last season; this may be the first of many last hurrahs for the guys! See our gallery for all the pics!

While the ever-lovely Kim Kardashian shopped in Beverly Hills yesterday at Diavolina, she had a chance encounter with the ever-gorgeous Adrian Grenier and the two mugged for our cameras exchanging air kisses and a sweet little hug. Awww!

The pair were actually playing dueling cameras -- Kim was shooting Keeping Up With the Kardashians, of course, and Adrian, Entourage.

Season FIVE of the Kardashians launches this Sunday -- can you believe the Ryan Seacrest production is already five seasons in??!!

Unfortunately Kim had a little car trouble ...

Adrian Grenier is ditching his Entourage boys and taking a dive into the ocean to help save the bluefin tuna. Ironically on his hit HBO series, Grenier's character Vinnie Chase played Aquaman, so it looks like this may be his real life chance to become a superhero in the ocean!

The blue-eyed hottie slips into his wetsuit, straps on his goggles and gives us an up close and personal look under the sea at the fish he says "we're eating ... to the brink of extinction."

Who knew bluefin tuna, some of the fastest fish in the ocean, were facing extinction? Thanks to Adrian, we do now.

Guess she wants to be part of his Entourage! (Which, by the way, returns this Sunday.) Adrian Grenier partied at Soho House last night and was greeted with a kiss from a female fan on his way out. Lucky guy!

Adrian Grenier was snapped on the set of Entourage yesterday, and not only did he show off his recently shorn locks and a sick black Ferrari, but he turned the cameras on photographers during a break from filming. Aww, at least he's a good sport about it!

And we can't WAIT to catch Vince, Ari, E, Drama and Turtle back on the tube on June 27!

The cast of HBO's hit show Entourage - minus Jeremy Piven - resumed filming at Urth Caffe, their fave location, on Monday...

Adrian Grenier doesn't really look comfy on that motorcycle, but whatev! Everyone still loves this hip show even though it's not 2004.

Except her outfit is in black, not white!

Seriously, what's with the Gossip Girl girls dressing so, er, flirtatiously? Cover up! It's cold in NYC. At least Michelle Trachtenberg is keeping it classy.

These two - along with Pete Wentz and Adrian Grenier - attended the American Eagle Flagship Store opening party in Times Square last night... but who looked better showing off the cleavage, Leighton or Blake?