Tom Cruise, Katie Holmes, and daughter Suri Cruise leaving the Carlyle hotel on the East Side in New York City on January 14th.

Katie Holmes discussed the three M’s with David Letterman Monday night: marathons, her movie Mad Money and, most importantly, motherhood.

“They do grow up so quickly,” Holmes, mother of daughter Suri, who turns 2 in April, told the Late Show host (who is father of son Harry, who turned 4 in November).

Of being a parent, Holmes, 29, said, “It is beautiful [to] become part of that club. It’s sweet, and suddenly your life is just magical.”

Letterman wondered if, like he, Holmes tends to wake up her child when she’s napping, because she misses her so much. Holmes said she does do that to Suri, “and stare and kind of kiss her and see if, maybe, she’ll wake up.”

Bedtime for Suri? “She goes to sleep pretty late, because we go to sleep late,” says the mother. “Around 11.” She wakes up at 9 the next morning.

“Jackpot!” exclaimed Letterman, whose Harry is up at 6 every morning. “It’s like he was driving the Today Show crew to work.”

Holmes also said she wouldn’t mind if Suri grew up to become an actress. “I’m excited,” she said. “She’s so sweet and already talking a lot. You can already see she’s a wonderful artist.”

Not touched upon during Holmes’s visit was Andrew Morton’s controversial, unauthorized biography of Holmes’s husband, Tom Cruise, despite the publicity that the new book is receiving. Similarly, earlier on Monday Holmes spent eight minutes on Good Morning America with Diane Sawyer, who also never broached the subject.

But in the GMA case, the program’s executive producer Jim Murphy told Tuesday’s New York Post’s Page Six that it had been Sawyer’s intention to inquire about Holmes’s reaction to the book, but the segment simply ran out of time.

“It was one of those bad calls on my part,” Murphy is quoted as saying. “Diane doesn’t generally get angry, but was she disappointed in how I handled it, yes.”

Murphy also told New York’s Daily News that there were no restrictions placed on Sawyer’s questions before the interview. “She had every intention of going there,” he said.

Cruise’s rep has called the book a “false, vicious and bigoted attack” on the actor and his family.

Source, WENN