However, the support for his sweetheart didn't stop there, as Slater also posted a picture of the two-time Grammy Award winner on his main feed. The snap, taken from behind, features Grande holding multiple pink balloons – Glinda's signature color – while wearing an oversized sweater and looking out the window.

Just minutes after Ariana Grande earned an Oscar nomination for her role in Wicked, Ethan Slater celebrated his girlfriend—who he met on the set of the musical—on social media.

Ethan Slater is marking Ariana Grande 's first Oscar nomination with a sweet tribute. Shortly after the announcement on Thursday, the actor shared a photo of his "Wicked" co-star on Instagram. The image captures Grande from behind, standing on a balcony with pink balloons in hand, gazing out a window.