"Me...and my two favourite guys," she captioned the post.
The Holidate star gave birth to her son on Sunday, December 27 in Los Angeles.
In December, the star sat down with Cosmopolitan for an interview where she discussed how she originally wanted to be married and have children by the age of 24.
"At 16, I thought, 'By the time I'm 24, I'll be married with kids,'" she said. "And then I was 24 and I was like, 'Remember when I said I would be married with kids by now?'
"It sounds cheesy, but the moment that I stopped thinking about it, we got pregnant."
However her pregnancy journey wasn't easy, as the niece of Julia Roberts explained that she was diagnosed with endometriosis as a teenage girl.
"I was told, 'You should probably freeze your eggs or look into other options,'" she said. "When I found out about my fertility, I was kind of stunned. It felt so permanent, and oddly, I felt like I had done something wrong."
Rhodes is Roberts and Hedlund's first child together.
