Kim and Kourtney: "Keeping Up with the Kardashians" Party

Celebrating an all-new season of family fun (and hardships), Kim Kardashian was front and center at Comcast Entertainment Group's party for the premiere of "Keeping Up With The Kardashians/The Spin Crowd" in West Hollywood, California on Thursday night (August 19).

The brunette beauty was joined by her adorable sister Kourtney, as well as parents Kris and Bruce Jenner, at the swanky Trousdale held soiree.

Also joining in on the fun were Tinseltown gals including Kelly Osbourne, who mingled with Robin Antin, as well as Stephanie Pratt, Maria Menounos and Sophie Monk.

Tweeting upon finishing up the festivities, Kim excitedly wrote, "What a fun night! Keeping Up & Spin Crowd premiere party! Love u @JonathanCheban @SimonHuck @MissKellyO @RobinAntinPCD exhausted going 2 bed"

Meanwhile, during the fifth season of "Keeping Up with the Kardashians" - which debuts Sunday, August 22 at 10/9c on E! - fans will get to see Kim go about the single life.

She tells Us Weekly magazine of her fling with Miles Austin, "You'll see a little bit of him, but I'm single. This is the first time in my life that I can focus on me, myself and my career. As much as I want to be in a relationship, I'm trying to fight that."

Enjoy the pictures from the Comcast screening of "Keeping Up with the Kardashians" (August 19).