Whose incredibly cute son is this?

Chloe Best

Olivia Wilde thrilled fans by sharing an adorable photo of her son Otis on Monday. The Vinyl star couldn't resist praising the toddler for being well behaved during his visit to the dentist, sharing a snap of him smiling sweetly in the chair while waiting for his check-up.

Far from being an upsetting experience for the youngster, Otis appeared happy as he sat on the chair with a grin on his face, and his curly blond hair tucked behind his ears.

CLICK TO VIEW FULL GALLERY

Olivia Wilde shared a sweet photo of her son Otis at the dentist

"Better behaved than I've ever been at the dentist," Olivia captioned the photo. "Guess they gave him the good drugs."

The sweet snap soon attracted over 30,000 likes and hundreds of comments from Olivia's followers, who not only described Otis as "cute", but also expressed their surprise at how grown up he looked.

Otis is Olivia's first child with fiancé Jason Sudeikis, and will turn two in April. The proud mum recently opened up about life with her son in an interview with E! News, describing him as "the best".

><img alt=VIEW GALLERY

Olivia and Jason Sudeikis' son will turn two in April

"He's thriving, he's really happy," she said. "Every day there's a new development but we're just really lucky that he's healthy and he's the best!"

Olivia often shares sweet moments with her son on social media, including a photo of him meeting a rabbit earlier this month. "This was a big deal," she wrote at the time. "Thanks to the lovely bunny and her owner for letting us freak out for an hour."

Another sweet image showed Otis attempting to put make-up on his mum, who was preparing for a high profile appearance. "My makeup guy may be a little young, but what he lacks in experience, he makes up for in drool," Olivia wrote.

Jason is equally smitten with the youngster and previously said of Otis: "He smiles a lot. I would say any looks he's got going – I feel like he's a real cute little guy – that's Olivia's doing. And then him smiling is both of us because we're really lucky."

More on: