Hilary Duff has shared the first picture of her newborn son on twitter.

The 24-year-old welcomed baby Luca on March 20, and gave fans their first glimpse of the infant by posting a photo on the microblogging site.

Wrapped in a blanket and staring up at the camera, the wide-eyed tot is the first child for the former 'Lizzie McGuire' star and her NFL player husband MIKE COMRIE - who she married in August 2010.

Hilary first teased fans with a snap of two-week-old Luca's feet yesterday (03.04.12), with the caption ''My favorite little feet'', and says she is managing to get into the swing of motherhood.

She tweeted: ''1st outing complete with no tears! Made it home early...just in time to feed Luca. figuring this motherhood thing out! Yay! A grown up din;) (sic)''

The actress has now set about getting back in shape and started with a haircut and trip to the gym on Sunday (01.04.12) after joking about her appearance in the final stages of pregnancy.

She wrote: ''You should have seen what I looked like last week. eek surprised I still have a husband! It was time to throw them heels on;) guurl (sic)''