Not all relationships are bound to last forever.

Thirteen years that they've been together, Tim Burton and Helena Bonham Carter decided to call it quits, Carter's rep broke the news of the couple's split to People.

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Their separation came "amicably earlier this year and have continued to be friends and co-parent their children," said the rep.

"We would ask that you respect their privacy and that of their children during this time."

The eccentric couple - who never tied the knot - got to know each other on the set of 2001's Planet of the Apes, where 56-year-old Burton was the director, while Carter, 48, was featured.

Since they've been together, the couple collaborated with each other (often together with Johnny Depp) on a number of blockbuster hits, including Charlie and the Chocolate Factory, Sweeney Todd: The Demon Barber of Fleet Street, and Alice in Wonderland.

As early as 2010, rumors were already swirling that their relationship was already on the rocks. It was earlier revealed that the two were sleeping on separate beds and, later on, reports came out they were actually living in separate but adjacent houses.

"We just have two houses knocked together because mine was too small. We see as much of each other as any couple, but our relationship is enhanced by knowing we have our personal space to retreat to. It's not enforced intimacy. It's chosen, which is quite flattering, if you can afford it," Carter revealed on U.K.'s Radio Times.

In 2013, photos of Burton kissing another woman were picked by the media. The Oscar-nominated actress, however, denied that the acclaimed director had been unfaithful to her.

"This is an absolute nonsense story, the pictures were taken whilst they were out and the large group includes family, friends and work colleagues," Carter's rep told Us Weekly.

TagsHelena Bonham Carter, Tim Burton, helena bonham carter tim burton split