As with most new parents, Nicole Kidman and Keith Urban might have difficulty telling what day it is. No matter. From here on out, they'll have a little Sunday every day. The Oscar-winning actress and her country-star husband welcomed a baby girl on Monday, then named her after the day before.

"Earlier this morning Nic gave birth to our beautiful baby girl, Sunday Rose Kidman Urban," read the message posted on Urban's Web site. "We want to thank everybody that has kept us in their thoughts and prayers. We feel very blessed and grateful that we can share this joy with all of you today."

The first baby for Kidman and Urban, Sunday weighed 6 pounds, 7 1/2 ounces, according to Paul Freundlich, a publicist for the singer. There was no immediate explanation for the name, though one thing is certain: She'll never be upstaged by the likes of Suri, Apple, Moses, or Shiloh.

Sunday - not the day on which she was born, lest she be associated with the beginning of the work week - joins a long list of offbeat celebrity baby names, from Suri (of Tom Cruise and Katie Holmes), to Apple and Moses (of Gwyneth Paltrow and Chris Martin) and Shiloh, Brad Pitt and Angelina Jolie's most recent addition.

Kidman and Urban married in June 2006. She has two children, Isabella and Connor, from her marriage to Tom Cruise. Cruise filed for divorce in February 2001 after 10 years of marriage, and the divorce was finalized later that year.

Kidman, 41, won an Oscar for her role in the 2002 film "The Hours."

During a concert Saturday in Nashville, Urban said, "I'm going to dedicate a song to my very, very, very, very, very pregnant wife" before singing his hit, "Better Half."

Urban, 40, won a Grammy in 2006 for best male country vocal.

The couple, who were both raised in Australia, have a home in Nashville.

In a recent radio interview in Nashville, Kidman revealed that Urban had been getting hands-on in preparation for the birth by attending Lamaze lessons, saying, "He doesn't know the name (of the classes), but he has been very good at it!"

So when will Sunday's birthday finally fall on a Sunday? That won't be until 2012, when she turns four.

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On the Net:

http://www.keithurban.net/site.php