Hollywood star Katie Holmes is rumoured to be pregnant with her second child with husband Tom Cruise.

The Mad Money actress - who has a two-year-old daughter Suri with Cruise - was seen celebrating America's Independence Day with an apparent baby bump, prompting suggestions she could be expecting her second child.

Recent reports claimed Katie, 29, is "itching" to add to her brood now Suri has turned two, because she misses having a baby in the house.

A source close to the star said: "Katie said she has got the itch. Now that Suri is a toddler rather than a baby, she said she misses having an infant in the house. And, of course, Katie thinks Suri would make a great big sister!"

Katie, Tom and Suri spent the holiday weekend at their Telluride home in Colorado.

They joined locals for the national holiday festivities, with Tom donning a cowboy hat and Suri wearing a bright red headband complete with two American flags.