Ariana Grande and Graham Phillips get together for a mini 13 reunion

Ariana Grande and her once rumoured boyfriend Graham Phillips were spotted together at the Red O restaurant in Los Angeles on Saturday (16 July). Both the child stars worked together on Broadway's hit musical 13, seven years ago. During the get-together, the former couple was joined in by an unidentified friend.

Phillips, who played Evan Goldman in the musical, shared a photo of the trio on Instagram and captioned it: "Lil 13 reunion."

"They had a wonderful time. Both of them, and their guests, were an absolute delight and stayed late into the night," a source told E! Online. "They treated everyone amazing!"

The Bang Bang singer was also seen in her elements at the get-together. She has been enjoying the developments in her career – Grande's latest studio album titled Dangerous Woman reached the number one spot on the iTunes chart on 20 May – one of the tracks from the album titled Into You was her eighth song to touch 100 million plays on Spotify.

Recently, the singer took to Twitter to express her gratitude over the success of her album and said: "Babies, what an emotional day. overwhelmed & excited. I love you. thank you for everything always. !!!! To the people who have gotten the album in the territories where it's out already, I love u. thank you. a few more hours for us over here!!!"

The 23-year-old will next be seen on TV portraying the character of Penny Pingleton in Hairspray Live! which is set to air on 7 December 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 had said on Twitter. "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 said. "Hope to make u proud."