Chrissy Teigen and John Legend's newborn son steals hearts in blue outfit

Miles Theodore Stephens flashed a rather curious smile as he lounged on a bean bag. The adorable little boy donned a sky blue onesie printed with giraffes during his chill lounging session.

Miles was born to Chrissy Teigen and John Legend on May 16, and the proud parents have been sharing precious moments of their first born son on social media since his birth.

Through an Instagram post, they announced their baby boy's name just hours prior to attending the 2018 Billboard Music Awards. During the awards night, Legend shared the reason for choosing the names "Miles" while on an interview with E! News.

"We named our first daughter Luna Simone Stephens and every name we give to our kids I think will have a little bit of musical history to it. Miles of course is the same name as the great Miles Davis and Chrissy really liked the name Theodore, so we put it all together and had Miles Theodore Stephens. When he came out and we hung out with him for a little while, we were like, 'He looks like a Miles'."

The Legends have evidently gotten used to being a family of four, and Luna has embraced her role as a big sister.

Chrissy has made sure to share the sweet moments between the two siblings, gushing over how Luna has been doing a great job in taking care of baby Miles. In the photograph, Luna could be seen watching over her baby brother as he laid down on his furry crib, feeding him a pacifier.

Teigen announced that she had given birth on May 17, her second child with John. Three days later, she debuted a photo of their newborn baby boy on Instagram looking peaceful as he slept.

"Hello, world! This is Miles Theodore Stephens. We are drowning in his little peeps and nuzzles. Our household feels overwhelmed with love. Thank you for all your well wishes!"

Chrissy Teigen married John Legend in 2013, after dating for six years. They first met on the set of Legend's music video shoot for "Stereo" in 2007, where Teigen starred as his love interest. Since then, they have been happily married, sharing two children.