Two children — two parent branches and an unusually clear privacy boundary

Scarlett Johansson’s 2 Children: Rose and Cosmo

The children are paternal half-siblings, not children from one marriage. Jost is Cosmo’s father and has spoken warmly about being Rose’s stepfather; Dauriac remains Rose’s father.

A surprising amount of online precision is not supported by the strongest original announcements. Rose’s representative confirmed her arrival without giving a day, and Jost confirmed Cosmo’s name and birth in August without publishing an exact date. This guide does not turn repeated secondary dates into certainty.

Johansson has also asked publications not to use unauthorized photographs of celebrity children. A useful profile can explain the family structure and her own parenting statements without defeating that boundary by reconstructing two private childhoods.

Scarlett Johansson’s children at a glance

Rose and Cosmo share their mother. Their fathers belong to separate relationship branches, and Colin Jost is Rose’s stepfather rather than her biological father.

The bounded age for Cosmo is intentional. If his birthday falls after 14 August, he is four; if it falls on or before the review date, he is five. No strong reviewed announcement disclosed the day.

What is publicly verified about Rose Dorothy?

Rose is Johansson’s elder child with French journalist and advertising executive Romain Dauriac. A representative confirmed the birth in September 2014 and said mother and daughter were doing well, while withholding the exact date.

Johansson and Dauriac later divorced. Public reporting describes co-parenting, but the details of Rose’s school, friendships and daily routine are not necessary to establish her place in the family.

In a 2025 interview, Johansson said Rose had shown interest in making videos for The Outset, her mother’s skincare company. Johansson declined because participation could remove anonymity before Rose was old enough to make an informed choice. That is evidence about the parent’s privacy rule, not a claim that Rose wants a public career.

What is publicly verified about Cosmo?

Cosmo is Johansson and Colin Jost’s son. Jost announced in August 2021 that they had welcomed a baby and named him Cosmo. The couple had married in 2020.

Johansson later discussed the physical comedy of parenting a toddler, and Jost has told light stories about the name. These are dated parental anecdotes; they do not establish Cosmo’s present personality, interests or future work.

The careful 2026 answer is therefore short: Cosmo was born in August 2021, is four or five on the review date, and remains a private child. A profile does not become more useful by pretending an exact birthday or collecting unauthorized sightings.

How do the two parent branches work?

Calling both children simply “Johansson and Jost’s kids” erases Dauriac’s parent branch. Calling Jost only Cosmo’s father misses the step-parent relationship he has publicly acknowledged. Both facts fit when their roles are named accurately.

Johansson’s earlier marriage to Ryan Reynolds did not create another publicly documented child branch.

Why is so little published about the children?

Johansson’s argument is about consent and irreversibility: a child can later choose a public life, but cannot easily recover anonymity once an image, account or brand identity has been widely distributed.

That creates a clear editorial test. Names, parent branches, broad birth timing and directly attributable parent statements answer the reader’s question. Addresses, schools, candid images and private accounts do not.

What older Scarlett Johansson profiles should correct

The first correction is age. Rose is no longer nine, and Cosmo is no longer two. A page that hard-codes a child’s age without a dated review becomes wrong every year.

The second correction is structural. Jost’s genuine step-parent role should not overwrite Dauriac’s fatherhood, and a privacy-minded family should not be presented as mysteriously withholding content that readers are owed.

Scarlett Johansson family timeline

Questions people ask about Scarlett Johansson’s children

How many children does Scarlett Johansson have?

Scarlett Johansson has two children, Rose Dorothy and Cosmo.

Who is the father of Scarlett Johansson’s daughter Rose?

Rose’s father is Johansson’s former husband Romain Dauriac.

Who is the father of Scarlett Johansson’s son Cosmo?

Cosmo’s father is Johansson’s husband Colin Jost.

How old are Scarlett Johansson’s children?

On 14 August 2026, Rose is 11 and Cosmo is four or five because his exact August birthday is private.

Is Colin Jost Rose’s father?

Jost is Rose’s stepfather. Romain Dauriac is her biological father.

Why are there few public details about Rose and Cosmo?

Johansson has repeatedly said that preserving her children’s anonymity is important to her.