What are they up to? We did some digging.
The Australian-bred choreographer to the stars -- who has filed a series of complaints against the Michael Jackson estate alleging sexual abuse -- got his start appearing in a series of MJ videos in the early '90s before moving on to working on choreography for Spears and *NSYNC and branching out into songwriting, directing and working on two seasons of So You Think You Can Dance.
The dancer currently lives in Maui, and based on the work posted on his official site, he's become active in producing and directing shorts for a number of small businesses and nonprofits on the island.
Britney's second husband and father of her sons, Jayden James and Sean, is a former backup dancer (LFO, Justin Timberlake) and part-time rapper who famously co-starred with his ex in the aptly titled 2005 reality series Britney & Kevin: Chaotic. Following their split in 2006, Federline reportedly landed $20,000 a month in child support from his ex, which allowed him the time to model for Macy's and Kitson, take to the ring for a few WWE matches and guest-star on shows including One Tree Hill, Celebrity Fit Club and the Australian weight-loss show Excess Baggage.
The father of six is currently married to former professional volleyball player Victoria Prince, and when he's not posting pics of his brood, he makes the rounds DJing at clubs, including a gig last month at New York's Sapphire gentlemen's club.
?Brit's former assistant moved on to work for the Jonas Brothers in 2007, only to reportedly fly back to Team Britney two years later. Because Cullotta (like all the other subjects of this story) did not return Billboard's requests for comment, the only thing we know for sure is that her Facebook page is a very positive, life-affirming place these days.
For the last time, no, Brit's first husband and childhood pal is not the guy from Seinfeld. But, as depicted in the movie, he was married to Spears for 55 hours in 2004, until manager Rudolph made them annul the impulse buy at the Little White Wedding Chapel in Vegas. According to an Us Weekly story from 2016, Alexander spent nearly four months in jail on domestic abuse charges in 2015 after being accused of allegedly physically assaulting a woman he was dating in San Francisco. Alexander, then 34, pleaded guilty to one count of felony assault and served 111 days in a San Fran jail; the victim also obtained a restraining order against Alexander.
Mama Spears was frequently the buffer between Britney and the outside world in the movie, but in the intervening years, she has kept a low profile. According to what appears to be her official Facebook page, the Spears matriarch is a rep for the skincare line Rodan + Fields.
She also came out in support of granddaughter Maddie after the 8-year-old was seriously injured in an ATV accident.
Meanwhile, Spears' dad has kept a very low profile for years since he was appointed as the conservator of Britney's affairs in 2008 following her public meltdown. With almost no social-media presence to speak of, Papa Spears seems content to stay behind the scenes as he reportedly collects $130,000 a year to stay on top of her affairs, as well as 1.5 percent of the revenue from her hit Las Vegas Piece of Me residency.
Britney's shadowy short-term manager -- who came off as even shadier and more controlling in the film than he appeared to be during his brief period tending to Spears -- reportedly settled a seven-year war with his ex-client last year in the "low six figures" in connection with a defamation case he filed against the singer and her family in 2009, in which he claimed the Spears clan had publicly blamed him for her 2008 downfall.
Lutfi, who also briefly managed Courtney Love, frequently retweets Love and did not appear particularly enthused by the biopic.
It's unclear from his Twitter feed what his current occupation is, as his description includes just two words: "problem solving."
Jenna Dewan Tatum
Now married to actor Channing Tatum, former dancer Dewan Tatum has become a TV regular, with recurring roles on Supergirl, Witches of East End, American Horror Story, The Playboy Club and Melrose Place. She's also appeared in the films Step Up, The Grudge 2 and Take the Lead. Things are going pretty, pretty good for JDT.
BS' former personal assistant told Access Hollywood in 2009 that "the media made it appear a lot more insane than it really was," of the singer's most difficult period. She also clarified that she was not, as reported, fired after one year on the job, but said the second cousins remained best friends until Brit's dad said she couldn't come around anymore.
These days, the woman who tried to save her "cousin" from the paparazzi when they swarmed on her as Spears famously swatted away with an umbrella, runs Alli Sims Wedding and Events and seems like she's loving life and staying super busy.
The singer's longtime manager -- he got back on the job in 2008 after a four-year layoff -- still handles her affairs under his Maverick management group, which also works with Miley Cyrus, Steven Tyler, Fifth Harmony and Avril Lavigne.