'Happy Endings' is adding a group of mean girls courtesy of ABC Family.

According to TVLine, 'The Secret Life of the American Teenager' star Megan Park and 'Make It or Break It' actress Nicole Gale Anderson will play a pair of high school girls who connect with Alex and Penny.

However, the young duo turn sour when Jane enters the picture.

The episode is set to air Oct. 5.

In other casting news ...

NBC wants you, dear readers and viewers, to know that they are different. This is a new NBC, filled with period dramas, concept shows and the return of the multi-camera sitcom.

AOL TV hit the red carpet of NBC's 2011 Upfront Presentation to get the dish on how these new shows will help shape NBC straight from the stars themselves.

What's new? More comedies! Edgier dramas! The network is touting brand new shows with fresh concepts and old favorite stars.

Along with today's announcement of NBC's fall schedule, the network released trailers for most of its new shows. A few highlights? The Christina Applegate/Will Arnett comedy 'Up All Night,' for one, which looks like a welcome return to TV for the actress and her costar, Will Arnett, whose guest spots on '30 Rock' have proven more successful than his past attempts at full-time series work.

Also intriguing: the '60s-set drama 'The Playboy Club,' the mind-bending mid-season drama 'Awake,' and the mid-season musical 'Smash,' whose preview managed to look intriguing despite being essentially a minute-long clip of Katharine McPhee singing a Christina Aguilera song.

After the jump, find updated extended previews and descriptions of each new series.

Paris Hilton really needs to rename her show. Brittany Flickinger was her "best friend forever" after the first season, but they don't talk anymore. Then she filmed a season in the UK to find her "British best friend," at least keeping "forever" out of that title. She's got a second season starting tonight in the US, and now we're going to get a new season of My New BFF in the United Arab Emirates as well. Though, apparently UAE officials are making sure Paris' wild ways don't make it through customs.

She's also interested in having BFFs in other parts of the world, so really she's just building an international posse. Plus, with her track record so far, it's more likely that these are just BFFN "best friend for now," or perhaps PITFTPBRIJDTFTMAFAIDTTSIGAC "people I'll tolerate for the press but really I'm just doing this for the money and fame and I'll drop them the second I get a chance." So check out the second season of Paris Hilton's My New PITFTPBRIJDTFTMAFAIDTTSIGAC premiering on MTV tonight at 10 Eastern, and see who she'll drop next.