Credit: Susan Waters/

This pregnancy is going to be a smash!

Uma Thurman took a walk in NYC Tuesday following a checkup appointment with her obstetrician -- and the stunning Smash actress and former model, 41, proudly displayed her growing baby bump in a form-fitting black sweater, mini skirt and boots.

On late Monday the Pulp Fiction star's rep confirmed to Us Weekly that she's pregnant with her third child. The father is believed to be her financier beau Arpad Busson, with whom she reunited last year.

Thurman's baby-to-be will join Maya, 13, and Levon, 10, her kids with ex-husband Ethan Hawke. Hawke and second wife Ryan Shawnhughes have two children of their own: Clementine, 3, and Indian, 6 months.