The Grey's Anatomy star obviously couldn't bear to leave her little one at home when she headed for a workout so she took her along to a 'Mommy & Me' yoga class.
The 40-year-old smiled broadly as she showed off her eight-month-old baby to a friend at the centre.
Stella is Ellen's first child with husband music producer Chris Ivery, whom she married in 2007 one year after locking eyes with him in a grocery store.
He appears to be just as enamoured of their little smasher as the actress revealed to Ellen DeGeneres during a recent appearance on her chat show.
Showing off a picture of father and daughter in matching shirts Ellen, who plays Dr Meredith Grey in Grey's Anatomy, said: "Chris – he loves dressing her up like him".
"He goes out and buys her clothes that look like his clothes."