Holmes also talked about her role of stepmother.

"The kids are so sweet, they're so great with Suri and she lights up when she sees them," she said. "We have so many kids in our house, there's always this wonderful chatter and the great noise of kids."

The actress,claims her 44-year-old husband has played a key role in making the transition to motherhood an easy one.

"He's a great father and so it came to no shock that when we had Suri he was amazing with the baby," she said.

In other.news, after visiting a Shreveport, La., children's store recently, Suri (with a little help from her mom) sent the owners a thank-you note – on her very own embossed stationery.

Melissa Dixon, 23, co-owner of the Ladies in Waiting children's store, tells PEOPLE that Holmes, Suri and two bodyguards visited the shop after Holmes's assistant called ahead to say she'd be in.

"Katie was really friendly. When she came in she walked up and introduced herself and Suri. We probably had three other kids in here. She complimented everybody else's children and said how cute they were. She was really sweet.

"Katie let Suri walk around," Dixon adds. "One customer had a two-week-old baby and Suri wanted to pick her up. She would wave at the other children and want to play with them."