The House star uploaded a sweet snap of her three-month-old son to Facebook on Thursday night (17 July), showing him snuggling into her shoulder while on a walk.
Little Otis is wearing a grey hoodie, while mum Olivia is clad in a navy shirt emblazoned with the phrase 'rock and roll'.
Olivia and fiancé Jason Sudeikis welcomed Otis, their first child together, on 20 April. He was named after musician Otis Redding.
Meanwhile, it seems Olivia's been having a bit of trouble this week with a rather unscrupulous individual...
"To the person who stole my credit card and spent $800 at an aquarium, there's something awfully fishy about you," she tweeted.
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