Just because they're the buff and beautiful doesn't mean that they don't have their fair share of awkward ex moments. Business is business and when the silver screen calls, these celebs suck it up and play nice for the cameras -- and the paychecks.
From Upper East Side duo Blake Lively and Penn Badgley who are still playing the pining game on-screen after their off-screen split to Elizabeth Taylor and Richard Burton who worked together after two marriages and two divorces, these celebs know how to keep things professional.
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