The former Dawson's Creek star, 33, has taken up residence in a lavish New York apartment following her shock split from her husband of five years.
Pictures have emerged from inside the building, which is located in Manhattan's Chelsea district.
Luxury: Katie's new neighbour Christopher Hyland has opened the doors to his residence, giving sneak peek at the kind of extravagant living Katie is now enjoying in the lavish Manhattan apartment building
Eyes on the future: Katie, pictured in New York yesterday, moved into her new abode in the Chelsea district last week while Tom Cruise was in Iceland
The star's new neighbour - Christopher Hyland fabric merchant and editor of Hyland the app magazine - has opened the doors to his residence, giving sneak peek at the kind of extravagant living Katie is now enjoying as a single woman.
Hyland lives on the 12th floor of Holmes' new building. (It is currently on the market for $23 million).
It is a 12-room 4,000 square-foot property filled with photography by Robert Mapplethorpe, paintings by Hudson River School masters, and artifacts from ancient Greece and Rome, according to the New York Daily News.
Katie spent last week setting up home in her new flat, shopped for supplies at a Whole Foods in Manhattan on June 27 - just one day before filing for divorce.
The star, who was joined by her daughter Suri, purchased flowers, laundry detergent, cleaning supplies, olive oil and other items, according to Us Weekly.
Katie reportedly secretly signed the lease on the place three weeks ago for a rumoured $12,000-per-month.
Room with a view: Holmes will likely enjoy a similar outlook of the city skyline
Living the high life: Katie is understood to be paying $12,000-a-month to live in the block
A source told Us Weekly: '[Producers] were begging her to sign on for a reunion movie. Tom said absolutely no way and thought going backward would be bad.
'Katie didn't care how "low-brow" he thinks Dawson's Creek is. She wanted to do the movie and reconnect with her fans. And have fun - something she rarely does anymore.'
Just the two of us: Katie has already moved into the building with her daughter Suri
Yours for a snip: Hyland is currently selling the 12th floor apartment for $23 million
The pair are set to go into battle over their daughter, with Katie willing to do 'whatever it takes' to win sole custody.
Sources say she has seen how Tom's second wife, Nicole Kidman, has been cut out of the lives of her children with the Rock of Ages actor, Isabella, 19, and 17-year-old Connor, and Katie will not let that happen to her.
Welcome to the neighbourhood! Hyland has described new resident Katie as a 'princess'
'Katie will not be relegated to a secondary role in her daughter's life, period, and she is prepared to fight Tom in court. Katie isn't going to back down, and she will do whatever it takes to ensure that she raises Suri herself.'
She filed for divorce in New York as the courts there are more likely to grant one parent sole custody.
However, Tom is set to file a response in California and is determined to get joint custody of Suri.
The couple married in November 2006.
Not a very happy birthday: Tom Cruise, pictured yesterday, is said to have left Iceland in the early hours of this morning
