Chrissy Teigen and John Legend are now parents of four.

Teigen announced the arrival of their son, Wren Alexander Stephens, in a thoughtful Instagram post on Wednesday, sharing how their baby boy was born Monday, June 19, via surrogate.

In her post, the cookbook author detailed her unique experience being pregnant at the same time as her incredible, loving, compassionate surrogate, Alexandra, who gave birth to Wren just five months after the star welcomed daughter Esti in January.

Teigen decided to pursue IVF while working with her surrogate in hopes of achieving her dream of having four kids. The star and Legend already shared daughter Luna, 7, and son Miles, 5, at the time.