Sam Smith, Brandon Flynn Celebrate at 'SNL' After-Party

10/8/2017 6:34 AM PDT

Sam Smith and boyfriend Brandon Flynn Celebrate at 'SNL' After-Party

Sam Smith and boyfriend Brandon Flynn celebrated Sam's "SNL" performance early Sunday morning by hitting up the big after-party.

Sam  and the "13 Reasons Why" star showed up at STK in New York City, after Sam performed 2 new songs off his new album -- "Pray" and "Too Good at Goodbyes."

Sam and Brandon have been all over NYC this past week, unveiling their relationship with some on-the-street PDA.

We also get the sense ... Sam's not a fan of the Speaker of the House. 

VIDEO