The Hunger Games star shares adorable picture after his wife...

Congratulations are in order for The Hunger Games star Alan Ritchson who has welcomed his third child with his wife Catherine Ritchson.

The father-of-three, who plays Gloss in The Hunger Games: Catching Fire, welcomed a son on Sunday, and Mum and Baby are said to be doing well.

Taking to Instagram to share his joy, he wrote: "Most of you probably have no idea that I'm married and have two amazing little boys (Calem 3yrs and Edan 1.5yrs. But today, the strongest person I know, @catritchson gave birth to our newest addition, Amory Tristan Ritchson. Say hello!"

Most of you probably have no idea that I'm married and have two amazing little boys (Calem 3yrs and Edan 1.5yrs.) But today, the strongest person I know, @catritchson gave birth to our newest addition, Amory Tristan Ritchson. Say hello! He weighs in at a cool 7lbs 12ozs and is only allowed to be a football player or a rapper. Love you Amory. Say hi to a world in need of more joy, innocence and love, like you.

A photo posted by Alan Ritchson (@alanritchson) on Dec 6, 2015 at 4:46pm PST

Grinning from ear to ear, the 31-year-old, who is already father to sons Calem and Edan, was clearly overjoyed at becoming a dad again.

"He weighs in at a cool 7lbs 12ozs and is only allowed to be a football player or a rapper. Love you Amory. Say hi to a world in need of more joy, innocence and love, like you."

Catherine also took to the social media site to share her excitement and an adorable picture of Baby Amory, as well as the meaning behind their son’s name.

Ecstatic to welcome Amory Tristan Ritchson to the world today! The name Amory means brave & powerful. We chose his name to equip our third born to feel he could be as much of a leader as if he were the first born. And at this intersection of life we are inspired by a speech by President Roosevelt referred to as "The Man in the Arena" for all of our sons, but in particular, where this soul may carve a path in life. "It is not the critic who counts; not the man who points out how the strong man stumbles, or where the doer of deeds could have done them better. The credit belongs to the man who is actually in the arena, whose face is marred by dust and sweat and blood; who strives valiantly; who errs, who comes short again and again, because there is no effort without error and shortcoming; but who does actually strive to do the deeds; who knows great enthusiasms, the great devotions; who spends himself in a worthy cause; who at the best knows in the end the triumph of high achievement, and who at the worst, if he fails, at least fails while daring greatly, so that his place shall never be with those cold and timid souls who neither know victory nor defeat."

A photo posted by Catherine Ritchson (@catritchson) on Dec 6, 2015 at 7:17pm PST

Congratulations to the family!