Kelly Preston is having an "easy" pregnancy.

The 47-year-old actress - who is due to give birth to her third child with husband John Travolta later this year - is amazed and delighted at how smoothly the last few months have gone.

She said: "It's been very easy and so wonderful. I've had no morning sickness and the pregnancy has gone by so quickly. I feel terrific."

The 'Last Song' actress - whose 16-year-old son Jett died in January 2009 after suffering a seizure - is so excited about meeting her baby she is counting down The Days until she gives birth.

She added to People magazine: "John and I are completely ready. My daughter is very excited too. I can't wait for the day to come."

Kelly - who also has a 10-year-old daughter Ella Bleu with the 'Pulp Fiction' actor - has previously confirmed she is expecting a boy.

'Saturday Night Fever' star John recently revealed his wife's pregnancy came after years of trying to conceive again, describing the moment they found out she was expecting as "a miracle".

He explained: "We tried for several years, and we didn't think it was going to happen again for us.

"This is a miracle, and we feel blessed and we are so moved by the generous outpouring of support and goodwill we've received from people all over the world."