Model/singer Paulina Gretzky is expecting her first baby with U.S. sportsman Dustin Johnson.

The star, whose father is Canadian ice hockey legend Wayne 'The Great One' Gretzky, showed off her growing baby bump in a photograph on Instagram.com on Wednesday (24Sep14).

In a caption alongside the snap, she writes, "@djohnsonpga & i are so excited to finally share with you all our amazing news... we're having a baby!!"

Gretzky has been dating golf ace Johnson since 2012, and they announced their engagement on Twitter.com last year (13).

Johnson is currently on hiatus from professional golf after reportedly testing positive for cocaine.