An Instagram photo of Olivia Wilde's baby boy Otis Alexander has been making hearts melt since the actress posted the picture on her account the other day.

In a report by People magazine, the Instagram photo of Olivia Wilde's was captioned "Rock and Roll, baby," and showed the infant being carried by the actress.

In the photo, the 3-month-old baby boy cuddled against his 30-year-old celebrity mom's shoulder, with his big brown eyes peering out at the camera, his face partly covered by Olivia's long wavy brunette hair.

The Instagram photo of Olivia Wilde's baby showed Otis wearing a gray hoodie with animal ears. Wilde, meanwhile, is seen in the photograph wearing a caption-appropriate "ROCK AND ROLL" sweatshirt.

Olivia Wilde's baby was named after the King of Soul, Otis Redding, whom Wilde has "always been a huge fan (of)", she shared at a June 2014 feature in People.

Baby Otis was born on April 20 to Wilde and doting actor dad Jason Sudeikis. The 38-year-old "Saturday Night Live" alum was said to have kept sharing cute photos of the baby while on the set of the romantic comedy film "Tumbledown", where he appears with Former "Glee" actress Dianna Agron.

A report from ABC News showed that other than the "rock and roll" Instagram photo recently posted by Wilde, she had previously shared a picture of Otis soon after he was born. A Twitter post dated April 24 showed a black and white image of the mother and child, captioned: ""Ladies and gentlemen, Otis Alexander Sudeikis has LEFT the building! (I'm the building)".

Wilde and Sudeikis reportedly began dating at the end of 2011. The two got engaged in January 2013. This will be Wilde's second marriage after being married to Italian filmmaker Tao Ruspoli from 2003 to the beginning of 2011. Otis is Wilde's first baby.