Did Zac Efron just drop a major hint that he's dating his Baywatch co-star, Alexandra Daddario?

Efron has reportedly been seeing Daddario since the two starred in the summer beach comedy in 2017, though they've yet to confirm or deny rumors of a relationship. However, an Instagram interaction may have proven once and for all that the pair are more than just friends.

On Wednesday (April 4), Daddario shared a photo of herself posing in a gown alongside her dog at home on Instagram, on which Efron cheekily commented, "Two hot b---hes!"

Daddario's followers immediately began to call out Efron for the comment, with some slamming it as offensive, and others using it as proof the two are dating.

Rumors of a relationship between the two young stars first ignited in early 2017, when Efron and Daddario began the promotional cycle for Baywatch. The two continued to spark speculation by liking and commenting on each other's social media and, in March 2018, the co-stars were seen walking their dogs and going to a pet store together in Los Angeles.

On March 16, Efron shared a photo of Daddario sitting on his lap on Instagram for her birthday, gushing in the caption, "Happy birthday to one of the the most real, down to [earth], stunning, intelligent, creative, loving, and most rare Pokémon ever created."

According to a source who spoke to HollywoodLife.com, Efron and Daddario are very likely seeing each other.

"She thinks he is super sexy, smart and hilarious, and she loved working with him. He finds her to be an amazing actress and really intelligent," the source told the tabloid.

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