Suri Cruise bundles up in a thick coat as she heads to theater to catch mom Katie Holmes' play in NYC

Her mother has proven herself to be a master of the casual-cool ensemble.

But Katie Holmes' Suri Cruise took things even further with a relaxed wintry look when she was spotted out in New York City on Wednesday.

The 18-year-old nepo baby — whom Holmes shares with her ex-husband Tom Cruise — was seen on her way to the Ethel Barrymore Theatre on Broadway, where her mother has been performing in Thorton Wilder's classic drama Our Town.

Katie appears as Mrs. Webb in the latest production, while Zoey Deutch appears as her daughter Emily and The Big Bang Theory star Jim Parsons plays the stage manager.

For her afternoon outing, Suri opted for a puff dark-green down jacket with a thick upturned collar that was guaranteed to keep her toasty.

She matched it with a set of straight-cut blue jeans that were faded over the thighs and knees. 

The celebrity daughter kept things low key with a pair of classic sneakers, and she brought along a brown leather tote bag.

Suri accessorized with a dark choker, and she styled her shoulder-length straight brunette tresses with a middle part to highlight her modestly made-up face.

Earlier in December, DailyMail.com exclusively reported that Suri had become a millionaire overnight after the trust fund her father Tom created for her became available to her on her 18th birthday in April of this year.

'It is part of the divorce deal that a trust fund provided by Tom Cruise be shared with daughter Suri Cruise when she turns 18, and it is substantial,' a source revealed.

However, there's no danger of her spending it all in a flash of opulent purchases, as the Mission: Impossible star organized it to be available to her in the long term.

'She was allowed to access it when she turned 18 in April. The rest of the money will become available to her once she enters her 30s,' the source continued. 'The trust fund was carefully constructed so that she does not get all the money at once and becomes overwhelmed.'

It was a double bounty for Suri, as DailyMail.com also learned that Katie had created her own trust fund for her daughter. 

'Katie is fiscally minded and is looking out for her daughter, of course,' another source shared. 'She wants her to be well provided for and have a great quality of life.'

There shouldn't be any issue paying for Suri's lifestyle due to her parents' incredible wealth.

Katie is already a multimillionaire worth an estimated $15 million, according to Celebrity Net Worth, but Tom's fortune is even more impressive, as he is worth around $600 million due to his lucrative film deals, according to the same site.

Despite his generous trust fund for Suri, Tom is reportedly no longer in her life.

The star has lately been spending most of his time in the United Kingdom, where he was seen catching up with Timothée Chalamet at an awards screening of his new Bob Dylan biopic A Complete Unknown.

Suri may be on her college winter break after she began attending Carnegie Mellon University in Pittsburgh, Pennsylvania.

Her mother Katie shared her feelings about Suri's big transition shortly before she moved out of the family home. 

'I'm proud of my daughter,' she told Town & Country. 'Of course, I will miss the close proximity, but I'm really proud of her and I'm happy.

'I remember being this age, this time of beginnings,' she added. 'It's exciting to learn about yourself, and I loved that time, so it makes me happy to think about it like that.'