NIGHT ON THE TOWN BACKGRID
UPDATE
1:50 PM PT -- TMZ Sports has learned the mystery woman is ex-NHL player Tie Domi's wife, Heather ... and it doesn't sound like they're an item in the slightest -- considering the former Toronto Maple Leafs player was present for the bash, too.
Brady and Domi go back ... and they even hit the ice together in 2024, with TB12 playfully beating up the longtime enforcer during a workout.
Tom Brady appears to have a new love interest in his life .