What will Tom Cruise and Katie Holmes' divorce mean for their 6-year-old daughter, Suri?

According to TMZ, Holmes filed for divorce Friday, citing "irreconcilable differences." She is asking for sole custody of Suri -- the couple's only child -- as well as a "suitable amount" of child support.

Though Holmes' attorney, Jonathan Wolfe, told People that the former "Dawson's Creek" star hoped to keep details under wraps, he did express that his client is focusing on what's best for Suri at this time.

Cruise is the father of two other children -- Isabella Jane and Connor -- whom he adopted in his previous marriage to Nicole Kidman. After their 2001 split, Cruise and Kidman agreed to joint custody of the two children, though they chose to live with Cruise in their teen years before moving into a Los Angeles home together.

"They live with Tom, which was their choice," Kidman told Hello! Magazine in 2010. "I'd love them to live with us, but what can you do?"

Holmes, who's the youngest of five children, told Marie Claire in 2010 that she wasn't looking to add to her family any time soon.

"Maybe in a couple of years, but right now I want to make sure I'm really there for Suri... I was a bit of an only child, and I liked it! I liked having all of my mom's attention, and sometimes I think I still do," she told the magazine.

Cruise recently told People that he was happy with his three children.

"I'm enjoying every second with Suri that I have. And I'm enjoying the relationship with my older kids, and the way it is right now," he said.

Below, photos of the couple with Suri in happier times:

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  • U.S. actor Tom Cruise, and U.S. actress Katie Holmes with their daughter Suri, leave a restaurant in Rome, early Friday Nov. 17, 2006. (AP Photo/Alessandra Tarantino)

  • Katie Holmes and her daughter, Suri Cruise watch the Los Angeles Galaxy play Chelsea during a World Series of Football exhibition soccer game at the Home Depot Center on Saturday, July 21, 2007 in Carson, Calif. (AP Photo/Mark J. Terrill)

  • Actor Tom Cruise, holding their child, Suri, and wife Katie Holmes watch the Los Angeles Galaxy's and New York Red Bulls' MLS soccer match from David Beckham's box in Carson, Calif., Saturday, May 10, 2008. (AP Photo/Chris Carlson)

  • Actor Tom Cruise holds his daughter Suri as they wait for Katie Holmes to finish the New York City Marathon in New York, Sunday, Nov. 4, 2007. (AP Photo/Kathy Willens)

  • Actor Tom Cruise's wife actress Katie Holmes and daughter arrive at Narita International Airport in Narita, east of Tokyo, Sunday, March 8, 2009. Cruise is here for the premiere of his new film "Valkyrie." (AP Photo/Itsuo Inouye)

  • Katie Holmes And Daughter Suri Visit "The Nutcracker"

    Actress Katie Holmes and her daughter Suri visit 'The Nutcracker' at the New York City Ballet on December 14, 2008 in New York City. (Photo by Amy Sussman/Getty Images)

  • Katie Holmes with daughter Suri at their hotel in Prague in 2010.