The McGregor family has grown by one!

Conor McGregor shared on Friday that he and his longtime girlfriend Dee Devlin have welcomed their second baby.

Read More: Conor McGregor and Dee Devlin expecting their second child

On Instagram, the MMA star shared an adorable snap of himself carrying the new baby out of the hospital, led by the newborn’s older brother, Conor, Jr.

McGregor did not reveal whether Conor Jr was heading home with a little sister or a little brother, nor did he comment on the newborn’s name.

Read More: Conor McGregor's secret weapon, his amazing partner Dee Devlin

“Heading home with my two healthy babies and an energized and healthy SuperMam,” McGregor wrote on the post. “2019 is off to the best start!”

He added: "Thank you for the well wishes everybody!”

Among the well-wishers on Instagram was actor Dwayne ‘The Rock’ Johnson, who said "Ohana! Congrats brother!!"

Read More: Conor McGregor and Dee Devlin share photos of new baby’s christening

What do you think Dee and Conor named their newborn? Let us know in the comments!

Conor McGregor and Dee Devlin welcome their second childGetty