Not only were Grande and Phillips, both 23, once a couple, the two also starred in Broadway's 13 musical together seven years ago. Following their get-together, Phillips took to Instagram to share a pic of their "lil 13 reunion," which featured another one of their pals.
The "Dangerous Woman" singer is currently gearing up to make her return to the stage (and TV!). She'll star as Penny Pingleton in the upcoming Hairspray Live!, set to air on Dec. 7 at 8 p.m. ET/PT on NBC.
"Most of you know that I'm really just a musical theater geek…. like a really big one… so…. my heart is very full re: this announcement," Grande announced on Twitter earlier this month. "I AM NOWWW A CHECKERBOARD CHICK #HairsprayLive #Penny. I've never been more excited for anything in my entire life."
"Penny has been a dream role since Hairspray opened on Broadway. At 9, I was (and still am) in LOVE w @KerryButlerNyc," she continued. "Hope to make u proud."