PARENTS

Ryan Reynolds Baby: The Star Shares First Photo Of His Daughter

05/14/2015 03:56 EDT | Updated 05/14/2015 06:59 EDT

Ryan Reynolds joins Instagram with a bang! On Thursday, the Vancouver-born star introduced his followers, and the world, to his baby girl... well, to her hand, at least.

His first post to the social media site was on May 11 -- a screen shot from his upcoming movie Deadpool. But his latest photo is much more personal. In the sweet pic, James is holding her proud papa's thumb. He captioned it with: "Thumb wrestling isn't always fair. Curiously, my hand is the small one."

Thumb wrestling isn't always fair. Curiously, my hand is the small one.

A photo posted by Ryan Reynolds (@vancityreynolds) on

Reynolds and wife Blake Lively welcomed their daughter to the world in January. At first, the rumour was her name was Violet. However, the couple revealed it's actually James, a family name, back in March.

In April, Lively reflected on her new life as a mom in the Los Angeles Times: "You never know when you're gonna get crapped on or when you're gonna get a big smile or when that smile immediately turns into hysterics. It might be like living with a drug addict. But you have a baby and you think, 'I can't imagine ever not having a baby,' because they grow up so quickly. I'd be an 80-year-old woman with a baby if I could."

ALSO ON HUFFPOST:

Celebrity Babies 2015