Tom Cruise has promised to donate the ultrasound machine he has bought for his pregnant fiancee Katie Holmes to a hospital when their child is born.

Cruise bought the $200,000 (€170.800) piece of equipment so he can keep an eye on the couple's unborn baby.

But he insists it will go to a good home after Holmes gives birth next year.

He tells US talk show host Barbara Walters: "I'm going to donate it to a hospital when we are done."