Oscar winner Jennifer had been dating Nicholas, for over a year. They had previously dated during filming of X-Men: First Class and then reunited on the set of X-Men: Days of Future Past.
The separation was "amicable", according to a source, who revealed to E!: "They spent a lot of time apart because of work, and it was difficult on their relationship."
Jennifer Lawrence and Nicholas Hoult split in June
Award-winning musician Chris also recently opened up on his split from Gwyneth, also an Oscar winner, suggesting that his own personal struggles played their part in the breakdown of the couple's ten year marriage.
"About two years ago I was a mess really because I can't enjoy the things that we are good at and I can't enjoy the great things around me because I am burdened by this," said Chris. "I've got to not blame anyone else and make some changes.
"I wouldn't use the word breakdown – this was more a realisation about trying to grow up, basically," Chris said of the split. "If you can't open yourself up, you can't appreciate the wonder inside.
Gwyneth Paltrow and Chris Martin split in March after ten years of marriage
Jennifer, star of the upcoming The Hunger Games: Mockingjay, has also previously spoken of her love of Britain - where both Chris and Nicholas are from.
"I'm a big fan of all things British," Jennifer told The Sun back in January. "I get to spend some time there now and again and I like that I can go for fish and chips wearing the most awful outfit and it's cool, you know?"