Olivia Wilde introduces the world to baby Otis on Instagram

Proud mom Olivia Wilde gave fans a first glimpse at her son's face by sharing an adorable mother-and-baby photo on Instagram.

Nestled in his mama's arms, the three-month-old cutie is the spitting image of his dad, Jason Sudeikis – fans have even pointed out that father and son have the same eyes.

“Rock and roll, baby,” Olivia captioned the snap, in which Otis can be seen peeking over his mom’s shoulder.

The Hollywood actress, 30, proudly took to Twitter on April 23 to announce the birth of her first son in an amusing post.

Read more: Olivia Wilde's 7 best maternity looks

"Ladies and gentlemen, Otis Alexander Sudeikis has LEFT the building! (I'm the building)," she tweeted, alongside a black and white photo of mother and baby. (In that photo, the newborn's face was hidden from view.)

Otis is the first child for Olivia and Jason, 38, who announced that they were expecting a child last October.The pair have been dating since November 2011 and got engaged in January 2013.

Don't miss a beat with HELLO! Canada's Daily Hits newsletter, your daily dose of royal and celebrity news, fashion, weddings and more. CLICK HERE to sign up for free!