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Jack Antonoff was spotted leaving the Chateau Marmont Hotel in West Hollywood on Thursday with a mystery brunette.
The sighting comes a day after it was claimed the singer, 33, is already dating someone new after splitting from Lena Dunham after five years together.
UsWeekly - Antonoff - Girls - Star - Musician
UsWeekly has reported that Antonoff has moved on from the Girls star and is now seeing an unnamed musician.
The Bleachers lead singer seemed upbeat as he headed to his ride after leaving the celeb-friendly hotel.
Baseball - Cap - Sweater - Brand - Fiorucci
He wore a yellow baseball cap along with a sweater by Italian brand Fiorucci and a pair of gray jeans.
His female companion was dressed in a funky semi-sheer long-sleeved black top with red piping and fluffy cuffs over a sleeveless top.
Pants - Fluffy
Her black pants also had fluffy...
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