Amanda Booth, 26, from Los Angeles, has been modelling for ten years and she announced her son, Micah Quinones, has been signed to the same modelling agent after realising that he loves the camera, too.
The mother said she hopes to work with her son one day so she can spend time with him on set.
She told ABC News: "As soon as the camera comes out, he looks right into it."
Micah has his own Instagram account, with more than 7,000 followers.
The description on his account reads: "My name is Micah, I'm a Leo, and enjoy long bubble baths."
Booth also documents her son's adventures on her account with 49,000 followers.
Booth has starred in a Lancome advert with Julia Roberts and is signed by Storm Management.
Micah was diagnosed when he was three months old, and Booth told Mothermag.com that she didn't know Micah had Down's syndrome when she was pregnant because she and her husband, Mike Quinones, chose not to have any prenatal testing.
Booth told the online magazine: "The results wouldn’t have changed anything, so why bother with the stress.
"Many babies with Down's syndrome have heart defects, and we were very fortunate that Micah was not born with any heart abnormalities, again."
Booth says her son is "freaking incredible". The model told ABC that everyone says her son is just like his mother: always happy to be in front of the camera.