Kate Winslet is a Mom

Kate Winslet will have to make more room in her lifeboat from now on. The Titanic star and her newborn daughter Mia are doing great and Winslet hopes to leave the hospital Monday, a publicist for the British actress said Sunday.

Mia - who weighed 8 pounds, 9 ounces, when she was born Thursday at a London hospital - is the first child for 25-year-old Winslet and her husband, Jim Threapleton.

The couple met in 1997 on the set of the British film Hideous Kinky, in which Winslet starred and Threapleton, 26, served as assistant director. They married the next year.

Winslet's New York-based agent Robert Garlock said the choice of the name Mia was a spur-of-the-moment decision.

"Kate and Jim had drawn up a list of 10 names, but when the baby was born, none of them seemed right," he said. "Then Mia came to them, and it seemed just right."

Winslet, who spent the summer working on Enigma, a British film about code-breakers during the Second World War, reportedly is planning to take a seven-month career break.