Naomi Watts and Liev Schreiber Naomi Watts and Liev Schreiber

Liev Schreiber missed Tuesday's premiere of X-Men Origins: Wolverine to be with his 21-month-old son, Sasha, who was hospitalized for respiratory problems.

The actor, who plays Wolverine's nemesis, Sabretooth, left Los Angeles to join his partner, Naomi Watts, and their two children in New York, People reports. Sasha remained in the hospital overnight and was released Wednesday morning.

"Sasha got home today and is feeling much better," Schreiber's rep said Wednesday.

Watts is currently shooting Fair Game, in which she portrays outed CIA agent Valerie Plame. Schreiber's next project is also CIA-related: He stars opposite Angelina Jolie in the upcoming thriller, Salt.

Follow TV Guide on Twitter for breaking news and scoop.