You know that hysterical thing? Initially, Ryan marketed himself as the man who would usher Phoebe to superstardom.
Mescal played Connell on Normal People and will appear in 's directorial debut, The Lost Daughter.
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The Lemon Leaf Cafe tweeted to thank the pair for eating at their establishment, with the move sending fans wild at the possibility of the duo dating.
The Los Angeles native is a member of the musical groups Boygenius, alongside Julien Baker and Lucy Daus, and Better Oblivion Center, alongside Conor Oberst.
The Irish actor and the American singer stepped out in style at the event on Saturday night, which took place at the Los Angeles County Museum of Art.