Courteney Cox kills it in a teeny bikini — at age 50

Happy belated birthday, Courteney Cox.

You turned 50 -- yes, Monica Geller is the big 5-0 -- on June 15.

And if this is what 50 looks like, we'll have whatever you're having. Popsugar has a gallery of Cox and her boyfriend, Snow Patrol guitarist Johnny McDaid, on vacation in Turks and Caicos. She's rockin' a black bikini -- and abs tighter than a guitar string.

Behold these photos that prove that Cox, like Jennifer Lopez, appears to be aging in reverse.