Actor Armie Hammer is to become a father for the second time.

The 30-year-old star, most famous for his roles in movies The Lone Ranger and The Man From U.N.C.L.E., posed alongside his pregnant wife Elizabeth Chambers at the Toronto International Film Festival on Thursday (08Sep16) as he announced the happy news.

With his hand on his wife's growing bump, which she showed off in a figure-hugging white dress, Armie beamed with delight for the picture, which he captioned: "Ready to start the #torontointernationalfilmfestival festivities… All three of us!"

Television presenter Elizabeth also shared the snap on her own Instagram and Twitter pages, writing: "Dressed and ready for the premiere of #Freefire. And the premiere of baby Hammer Number 2!"

The two are already parents to 21-month-old daughter Harper.

After becoming a father for the first time, Free Fire star Armie told E! News he was enjoying every moment of the experience.

"It's great. It's the best thing in the world. It's sort of a whole new perspective. I don't even want to sleep anymore. I just want to stay up and spend time (with my daughter)," he smiled. "I don't want to miss a smile. It's the best. I love it.

"Without getting too sappy, it's great!"

Armie and Elizabeth tied the knot in 2010 after being introduced by their mutual artist friend Tyler Ramsey. Their wedding was featured in Town & Country magazine, and Elizabeth told the publication she knew that Armie was going to be her husband shortly after they started dating.

"He sat me down and said, 'Look, we don't have to do this. We could just go our own ways, and then one day you'll be 40 and divorced and we'll run into each other, and we'll laugh and go out to dinner and have this same connection, and we'll wonder why we wasted all of that time,’" she told the magazine. "’Or we could just do it now and enjoy the ride.'"