ET's Thea Andrews is first on the set of the much-buzzed about "Cougar Town" for a little one-on-one with series' star Courteney Cox, who fills the ET correspondent in on the litmus test for spotting a cougar.

"You know you're a cougar when you're attracted to your son's friends. You know you're a cougar when you're attracted to your daughter's -- who's five -- idols, which is where I come in," Courteney jokes.

Courteney's daughter Coco is five and she has a huge crush on "High School Musical" star Zac Efron, who the former "Friends" star says would be ideal prey.

"Zac Efron would be perfect, but Zac probably has too much confidence to be real prey for a cougar," she tells Thea.

In the series premiere tonight, Courteney's character Jules hooks up with a guy not much older than her 17-year-old son and she gets a little competition from Barbara Coman (Carolyn Hennesy), who is also on the prowl for a hot young stud. So who else would she like to see guest star as a cougar?

"Wow, that's a great question, let me see … I would love for Lisa Kudrow to be on the show, I think she would be so funny. She would be hilarious as my rival cougar, or maybe she's someone that really teaches me how to be a cougar."

"Cougar Town" premieres tonight at 9:30 p.m. on ABC.