Selena Gomez, Zedd Double Date With Zac Efron and Girlfriend Sami Miro: Details!

Selena Gomez and Zedd
Selena Gomez and her rumored new boyfriend, DJ Zedd, went on a double date with Zac Efron and his girlfriend Sami Miro on Friday, Jan. 23 -- get the details Jeff Kravitz/FilmMagic

Oh my lanta! Selena Gomez and rumored new beau DJ Zedd were spotted grabbing a bite to eat in Atlanta, Ga., on Friday, Jan. 23 — but they weren't alone. An insider tells Us Weekly that Justin Bieber's on-and-off love went on a double date with Zac Efron and his girlfriend Sami Miro.

The foursome dined at STK, and were also joined by some of Gomez's backup dancers and friends, the source says. Gomez, 22, and fellow Disney alum Efron, 27, feasted on shellfish platters, scallops, and fish. (Efron and model Miro have been dating since October.)

"Selena and Zedd were definitely cozy and cuddling in the booth," the onlooker tells Us. "They walked out together." On Saturday, Gomez also posted a photo of the duo in an elevator — with Zedd's arms wrapped around her. "Hint #2 #iwantyoutoknow," she captioned.

Zac Efron & Sami Miro
Sami Miro and Zac Efron AKM-GSI

Gomez and DJ/producer Zedd first sparked romance rumors earlier this month when they were photographed holding hands at a Golden Globes afterparty. On Jan. 18, the "Heart Wants What It Wants" singer lounged on a bed while FaceTiming him. "'Oh hi derrling…" – The Room,'" Zedd, 25, captioned an Instagram pic of the chat.

"They are working together on her new album, so yeah, they have become close," a source previously told Us of the pair. "It's nothing but a close friendship so far."

Sign up now for the Us Weekly newsletter to get breaking celebrity news, hot pics and more delivered straight to your inbox!

Want stories like these delivered straight to your phone? Download the Us Weekly iPhone app now!