Paul Giamatti and his new friend seem to be pretty comfortable with one another already.

The “Billions” star, 51, was photographed cozying up to a mystery brunette at Tuesday’s Rangers game.

Giamatti sported a dark crew neck sweater and chinos, while his lady friend wore a floppy grey knit cap, an orange top and jeans.

Both seemed overjoyed by the Rangers’ action-packed 6-2 defeat of the Carolina Hurricanes, even ending up on the Madison Square Garden’s Jumbotron at one point.

The actor was previously married to director and producer Elizabeth Cohen. The couple has one child, a 17-year-old son named Sam, together.