Sean Penn's unwillingness to commit cited as the cause of his split from Scarlett Johansson
Now, the reason has reportedly emerged....
It’s understood that Oscar-winning actor Sean 'didn’t want to be tied down' and 'didn’t want anything serious' with the gorgeous 26-year-old.
Reports surfaced earlier this month that Scarlett and Sean - who is more than 20 years her senior - had split up following a whirlwind four-month romance, but this is the first time a reason has emerged.
A source speaking to Us Weekly also revealed that following the break-up, Lost in Translation star Scarlett was 'desperate' to get back together with Sean and pursued him at Spike TV Awards in Los Angeles.
However, the former hellraiser - who only divorced wife Robin in July last year - apparently tried to avoid Scarlett on the red carpet by sneaking into the bash through a back door.
Scarlett is the latest in a string of beauties to date the actor. As well as ex-wife Robin, Sean has also romanced model Petra Nemcova, actress Susan Sarandon and was married to Madonna between 1985 and 1989.
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