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Woody Allen and Soon-Yi Previn - The director had a 12-year relationship with actress Mia Farrow, and cheated on her with her adopted daughter, Soon-Yi Previn. Allen left Farrow and married Previn in 1997.

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Gwen Stefani and Blake Shelton -

It is rumored that Gwen Stefani started dating the country singer before ending her marriage with Gavin Rossdale in 2016. Stefani and Shelton are still together.

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Gabrielle Union and Dwyane Wade -

NBA star Dwayne Wade was allegedly still married to ex-wife Siohvaughn Funches when he started seeing Union. Funches later sued the actress for damages to her marriage. Their divorce was finally announced in 2010, and Wade went on to marry Union four years later.

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Jennifer Lopez and Marc Anthony - It is said that Jennifer Lopez and Marc Anthony started their affair while he was still married to ex-Miss Universe Dayanara Torres. He ended up divorcing her to marry J-Lo in 2004. They were married for 10 years before breaking up.

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Britney Spears and Kevin Federline -

The backup dancer was not a free man when he hooked up with Britney Spears. He was still in a relationship with the mother of his two children, Shar Jackson, whom he ditched to eventually marry Spears in 2004. Their marriage wasn't a happy one and lasted only three years. 

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Kevin Hart and Eniko Parrish - According to Kevin Hart's ex-wife, Torrei Hart, the comedian cheated on her with several women, including Eniko Parrish, whom he met in 2009 and married in 2016.

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Bruce Springsteen and Patti Scialfa - Bruce Springsteen married actress Julianne Philips in 1985 but soon regretted it and realized it was bandmate Patti Scialfa he loved. He reportedly cheated on his wife and finally divorced her in 1989. He married Scialfa in 1991.

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Kayte Walsh and Kelsey Grammer - Grammer began seeing Kayte Walsh, a flight attendant he met on a plane, while being famously married to Camille Grammer. The couple divorced in 2011, after 14 years of marriage, and he tied the knot with Walsh that same year, making it his fourth marriage.

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Miranda Lambert and Blake Shelton - The pair reportedly hooked up after performing together at the CMT Music Awards in 2005, while Shelton was still married to Kanyette Williams. He eventually divorced her in 2006 and wed Lambert in 2011. They divorced in 2015.

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Melanie Griffith and Antonio Banderas - The actors first met on the set of 'Two Much' (1995) and were both married. They eventually separated from their significant others to marry each other in 1996, but later called it quits in 2015.

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Tori Spelling and Dean McDermott - Spelling and McDermott met on the set of a TV movie in 2005. Although they were both married at the time, it is alleged that they began their affair the day they met. The lovebirds quickly separated from their respective spouses and said "I do" to each other in 2006. They announced their decision to separate in 2023.

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Julia Roberts and Danny Moder - Cameraman Danny Moder and Julia Roberts met on the set of 'The Mexican' (2001). She was in a relationship with Benjamin Bratt, while he was still married to his now ex-wife, Vera Steimberg. After both ending their respective relationships, they became man and wife in 2002 and are still going strong.

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Johnny Depp and Amber Heard - Depp was still involved with his partner of 14 years, French actress Vanessa Paradis, when he met Heard. The two met in 2009, on the set of 'The Rum Diary' and made it official in 2012, right after splitting from their respective partners. Their doomed romance would become the subject of one of the most high-profile celebrity lawsuits of all time.

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Rebecca Romijn and Jerry O’Connell -

Before tying the knot with Romijn, O'Connell was publicly dating television personality, Giuliana Rancic, who later claimed that the actor cheated on her with Romijn.

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Alicia Keys and Swizz Beats - Swizz Beats presumably began his affair with Keys while he was still married to Mashonda Tifrere, as he divorced her in 2011 and wed Keys that same year.

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Donald Trump and Marla Maples - Trump was married to his first wife, Ivana, from 1977 to 1992. The union fell apart when he began an affair with the model Marla Maples, whom he wed the year after. The marriage lasted two years.

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King Charles and Queen Camilla -

They first met in 1970, but went on to marry other people. However, it is suspected they had a love affair ever since, and eventually left their spouses. King Charles divorced the late Lady Di in 1996, and married Camilla in 2005. The "other woman" is now the Queen.

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Ethan Hawke and Ryan Shawhughes -

When the actor was married to then-wife Uma Thurman, he was messing around with the nanny. Too cliché? But it was more than an affair. Hawke and Thurman filed for divorce in 2004, and he married Shawhughes four years later.

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LeAnn Rimes and Eddie Cibrian - The very handsome actor was still married to Brandi Glanville when he met LeAnn Rimes on the set of a movie in 2009 and fell in love. They ended up both leaving their respective spouses to marry each other in 2011.

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Jerry Seinfeld and Jessica Sklar -

Seinfeld and Jessica Sklar met just two days after she returned from her honeymoon with Eric Nederlander in 1998. She asked for a divorce barely a month after they tied the knot, and made a second trip to the altar in 1999, this time to marry the comedic icon.

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Debra Messing and Will Chase - The former 'Smash' costars met on the set of the musical drama and soon began their romance. Chase was still married to his wife, but divorced her to pursue his relationship with Messing. Their relationship lasted three years.

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Gisele Bündchen and Tom Brady -

The American football quarterback allegedly left his pregnant ex-girlfriend Bridget Moynahan for the supermodel. He married Bündchen in 2009 and they stayed together until their separation in 2022.

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Ryan Phillippe and Abbie Cornish -

Actor Ryan Phillippe cheated on ex-wife Reese Witherspoon with 'Stop-Loss' co-star, Abbie Cornish. They started their affair in 2006 and Witherspoon filed for divorce the next year. The couple eventually split up three years later.

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Billy Crudup and Claire Danes - The actor left his seven months pregnant girlfriend, Mary-Louise Parker, for 'Stage Beauty' costar, Claire Danes. Their story didn't last, and came to an end four years later.

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Brad Pitt and Angelina Jolie -

In one of the best-known celebrity cheating affairs, Brad Pitt and Angelina Jolie met on the set of 'Mr. and Mrs. Smith' (2005) while he was still married to Jennifer Aniston. He divorced her almost immediately to go public with Jolie, whom he married in 2014. They filed for divorce two years later. 

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Humphrey Bogart and Lauren Bacall -

The actor met fellow-actress Lauren Bacall while filming the movie 'To Have and Have Not' (1944). They hit it off immediately, although he was still married to Mayo Methot. He soon walked out on Methot, and said "I do" to Bacall only three months later.

See also: Strange Hollywood hookups: celebrities you never knew dated

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