Tom Hanks believes he is the coolest grandparent

Los Angeles : Actor Tom Hanks thinks he and wife Rita Wilson are cool grandparents.

The 60-year-old, who has four children, Colin, 39 and Elizabeth, 34, with his late former wife Samantha Lewes, and Chet, 29, and Truman, 21, with Wilson, is a grandfather to three children.

Hanks says the little ones keep him entertained when he is watching them, reports etonline.com.

"When you have grandchildren, if you're with one of them or all three of them, look, there's no book, no radio, no TV. You're going to be entertained by them every moment that you're there. Sit back and watch the show," he said.

The "Sully" star and his spouse, also 60, believe they are fun grandparents to six-year-old Olivia and three-year-old Charlotte, whose father is Colin, as well as Chet's unnamed baby daughter.

"We're the cool grandparents," Wilson said.

"I think we're the most cool," Hanks added.

Meanwhile, the "Forrest Gump" actor said his marriage to Wilson doesn't take "vast work". People may think it is hard to maintain a relationship in the public eye, Hanks doesn't find it much different as he and his wife complement one another very well.

"People say, 'Jeez, it must be hard to stay married in show business. I think it's hard to stay married anywhere, but if you marry the right person, it might work out. We give each other a natural sense of support for whatever the other wants to pursue.

"Our marriage doesn't require vast work. We have been married 28 years and dig each other a lot," Hanks said.