Sean Penn showed off his bright white hair as he stepped out for a smoke.

The Hollywood heart-throb was barely recognisable as he rocked his new white hair. He clutched a box of cigarettes as he went for a stroll as he appeared gaunt and concerned.

The Milk actor, 63, showed off his toned physique in a white t-shirt. He teamed this with a pair of joggers and comfy white trainers.

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Read more: Sean Penn goes barefoot and leaves shirt unbuttoned as he dashes from hotel

Sean Penn showed off his bright white hair as he enjoyed a day out in Malibu (
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BACKGRID)

Sean was famously married to pop legend Madonna back in the 80s. Just last year, writer Mary Gabriel made bombshell revelations about their marriage in an extract from her new biography.

She claimed Madonna was said to have wanted a "marriage of equals" with Sean, but he wanted traditional gender roles and to be "the man" amid her skyrocketing fame.

Meeting on the set of the music video for her song Material Girl in January 1985, the couple wed months later in August of the same year. They split four years later, and further details of their marriage were revealed in Mary's book last fall.

In an extract in the Sunday Times, Mary wrote about how when things broke down, Madonna’s career was skyrocketing. She said: "In the three years since they [Madonna and Sean] had met she had gone from being an up-and-coming pop star to being the wealthiest female entertainer in the world."

She noted: "Their expectations for their relationship had also diverged. She wanted a marriage of equals. He had a strong streak of traditionalism that required him to be the 'man'."

Mary then noted how this caused paparazzi to plague the couple, which led to Sean "drinking more" and Madonna "working harder". Touching upon their projects in 1988, Mary then spoke of how on the Hurlyburly play's opening night, the couple fought. "The fight was unique in that it was so public, but it was just one more drama during those last months of 1988 as their bonds frayed," she elaborated.

Reflecting on the couple's split and the years that followed, Mary added: "Years later both took responsibility for the marriage’s demise. Penn described himself as an angry young man during that period and admitted he was hard to live with. For her part, Madonna said she hadn’t been ready to be married."

During their time together, they collaborated for a couple of projects. Madonna then dedicated her third studio album True Blue to her husband. But their love story wasn't to stand to test of time, which was apparent when Madonna filed for divorce in December 1987, but withdrew the papers two weeks later. The couple's divorce was then officially filed by Madonna in 1989, citing "irreconcilable differences".