Hilary Duff has introduced her son to the world by posting a picture of him online.

The proud mother of baby Luca Cruz Comrie showed him off just a fortnight after she gave birth.

It is the first child for Hilary and her retired hockey player husband Mike Comrie.

"Baby Luca, two weeks old," the actress and singer wrote about the tot who stared wide-eyed at the camera.

"Thank you for all the messages and well wishes. I love you all so much."

Hilary, 24, and Mike, 31, tied the knot in August 2010 and they welcomed their son on March 20.

The former Lizzie McGuire star has been keeping her fans updated on life as a new mother.

"4am Sleepy eyed. Feeding baby whew this job is no joke!" Hilary tweeted. "Oh how life has changed! Lol in such a wonderful way."

Hilary has also shared her struggle to get back into shape calling her time on the elliptical machine "an eternity" and says she's making the effort to get back to her best for her man.

"Eek surprised I still have a husband!!" she wrote. "It was time to throw them heels on."