The comedian, 54, and popular Full House star is set to wed his longtime girlfriend Melissa Bring, a Los Angeles-based photographer and producer.
"Melissa has been, truly, my best friend for nine years," Coulier tells PEOPLE exclusively in announcing his engagement. "We simply thought we would just make it a lifetime. I can't wait."
Expect a Full House reunion for the private wedding, set to take place in Montana on July 2, where Coulier, who played Joey Gladstone from 1987 to 1995 on the ABC sitcom, will be joined by former costars John Stamos, Bob Saget, Lori Loughlin and Candace Cameron Bure.
The wedding will be the second for Coulier, who was married to actress Jayne Modean from 1990 to 1992. He is father to a son, Luc Coulier, 23.