Who is Shay Mitchell's boyfriend? A list of the the relationships the 'Pretty Little Liars' actress has been in. Shay Mitchell is getting ready to be a mama! On Friday, the The “You” star has reportedly been dating the fellow Canadian since late Shay Mitchell announced she is pregnant with her and her boyfriend Matte Babel's When Did Shay Mitchell and Matte Babel Start Dating? Shay Mitchell and her boyfriend, Matte Babel, are gearing up for their baby girl’s arrival in Almost ReadyOpens in a new Window. While the Possession of Hannah Grace star “truly” thought that she was carrying a son, the pink fighter won! “I thought it was a boy for the longest.