Charlize Theron and Sean Penn Split 
 
 RELATED VIDEO: Did Charlize Theron and Sean Penn Split? 
 
 After starting a romance in 2013, Charlize Theron and Sean Penn have split, an insider confirms to PEOPLE.Nearly inseparable since getting together, often spending time with Theron's 3-year-old son, Jackson , the couple were last seen looking stunning on the Cannes red carpet in May.But in recent weeks, the couple weren't spotted together at all. According to sources, they stayed under separate roofs: Theron and son Jackson remained at their Hollywood home and Penn at his Malibu mansion, which he had put up for sale but recently pulled off the market. They backed out of at least one scheduled event together before Theron headed to London to film The Huntsman.Reps for the stars haven't commented on the split.When not promoting her film Mad Max, Theron , 39, and Penn, 54, spent time away from the spotlight, enjoying family time with Jackson on the French Riviera.Penn was spotted solo in the Brentwood section of Los Angeles Tuesday, purchasing magazines and cigarettes from a local newsstand.Just last month Theron raved about her partner to British Elle , calling Penn the "love of my life.""Putting aside that he's my partner, he's the love of my life; for the first time, I felt that my work was really bleeding into my life, and that made it hard," she told the magazine.Rumors of a romance first began in 2010 when the duo were first photographed spending the New Year together in Hawaii. ||||| Sad news. Sean Penn and his fiancee Charlize Theron have a called it quits after nearly a year and a half together, multiple sources exclusively confirm to Us Weekly. 
 
 One insider tells Us that the high-profile pair, who got together in December 2013, decided that their romance was over following their most recent jaunt to the Cannes Film Festival in the south of France. The source tells Us that Theron, 39, was the one to break things off with the fellow Oscar winner. 
 
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 Theron and Penn, 54, had known each other for decades before their friendship blossomed into romance. 
 
 A year into their relationship, Us exclusively reported in December 2014 that they had gotten secretly engaged during a trip to Paris. There was, however, no elaborate proposal. "There's no ring, but they are committed," an insider told Us at the time. 
 
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 In a memorable interview with Esquire UK this past March, Penn said he was ready to be a husband after his previous failed marriages. The actor was famously married to Madonna from 1985 to 1989, followed by House of Cards actress Robin Wright from 1996 to 2010; he and Wright share two grown kids, Dylan and Hopper. Meanwhile, the South African beauty's exes include Craig Bierko and Stuart Townsend. 
 
 "You say I've been married twice before, but I’ve been married under circumstances where I was less informed than I am today," Penn speculated of his future with Theron. "So I wouldn’t even consider it a third marriage, I’d consider it a first marriage on its own terms if I got married again. I mean, I like the tradition. A friend of mine wrote a line, 'Without tradition, new things die.' And I don’t want new things to die." 
 
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 He added in the same interview that he was "surprised to be in love" with Theron for many reasons. "I’m self-proclaimed bad at mathematics but I can do two plus two," he explained. "53 years old plus finally beginning to figure out why you haven’t been happy in a single relationship? It could seem too late. But to run into somebody now who you care about is a much more passionate, deeper, truer and – God! – a much happier feeling. It’s a lot more romantic and a lot more fulfilling to be in a relationship and to think you’re a good person within it." 
 
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 Theron echoed his sentiments in subsequent interviews, including one with Esquire this past April, in which she confessed that she was "shocked" to have fallen for Penn. "I'm a very, very, very lucky girl," she told the mag. "Very lucky. He's hot." 
 
 The Mad Max: Fury Road star noted to Elle UK in its June 2015 issue that Penn was it. "Putting aside that he's my partner, he's the love of my life," the mom to little Jackson told the publication. "For the first time, I felt that my work was really bleeding into my life and that made it hard." 
 
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– Two Oscar winners do not a happy couple make. At least that appears to be the case for Charlize Theron and Sean Penn, who've reportedly ended their engagement after a year and a half together, multiple sources tell Us Weekly. Theron, 39, who recently told Elle magazine's UK edition that Penn, 54, was "the love of my life," is said to have initiated the split, an "insider" tells Us. There's been no official comment from reps for either star, notes People. The couple were seen walking the red carpet together last month at the Cannes Film Festival, the magazine notes, but there haven't been any public sightings in the past few weeks—Penn was seen Tuesday buying magazines and cigarettes from a newsstand in the Brentwood neighborhood of LA, but he was solo. Sources also tell People the two have been living in separate houses, and Penn is said to have yanked his Malibu home off the market after recently putting it up for sale. (Penn filed papers to adopt Theron's son earlier this year.)