Chrissy Teigen has shared an adorable first photo of daughter Luna and her baby brother Miles.

The 32-year-old model and husband John Legend welcomed their second child into the world less than two weeks ago, and they had already predicted competition between the siblings.

But Chrissy's latest post on Instagram shows that there is only love between the pair as two-year-old Luna can be seen caring for her baby brother by handing him his pacifier in his crib.

The photograph is the first of the two children together and only the second picture of Miles to be released to the world since he made his entry into the world.

The 'Lip Sync Battle' host introduced Miles to her millions of fans on social media earlier this month with a picture of the three day old baby boy, captioned: ''Hello, world! This is Miles Theodore Stephens - We are drowning in his little peeps and nuzzles. Our household feels overwhelmed with love.''

John previously joked daughter Luna sees her new baby brother as ''competition''.

He said: ''I think she's just becoming aware that he's the competition. We'll see how that plays out, but I think it might be good because it's making her, like, she's doing more to ingratiate herself to us, which means it might be a good thing for her to have a little competition.''

The 'A Good Night' singer has admitted he's starting to ''remember'' what parenting a small tot is like, as he's already getting no sleep as he tends to his son.

He added: ''I am not [sleeping,] but it's okay. I'm starting to remember how it was the first time around with Luna. It's all coming back to me, and Chrissy too. This is that period in his life and our lives where you get less sleep and work a little harder. I'm trying not to work too much outside of the house because we got a lot to do at home.''