Scarlett Johansson got personal about her children — daughter Rose Dorothy and son Cosmo.

The Marvel star revealed she loved watching her infant son discover new details about himself.

The 4-month-old baby recently discovered a new body part that he couldn't stop touching.

"The Avengers" star's daughter was excited about the actress's upcoming animated movie, "Sing 2."

Johansson shared her son with husband Colin Jost while Rose came from a previous relationship.

The "Lucy" actress's mother-in-law didn't want her grandson to be named "Cosmo."

Jost's mother pestered the couple to change her grandson's name.

The "Ghost In The Shell" Star doesn't use any social media platform.

Johansson stated that her private life was her business and not for the public's enjoyment.