Normal People aired, but it sounds like Paul Mescal is officially off the market.The Irish actor, who celebrated his 25th birthday this week, appears to be dating American songstress Phoebe Bridgers, 26. Paul re-posted a photo of himself that Phoebe had shared on her Instagram Stories, showing the actor holding a sky-high pile of pizza boxes.MORE: Paul Mescal's sweet message for Daisy Edgar-Jones will melt your heart"Happy birthday pizza boy @paulmescal," Phoebe wrote.