James “Rhodey” Rhodes in the original 2008 Iron Man.
the coveted role as billionaire playboy Tony Stark, which gave Downey a major career boost.
But then when the sequel rolled around, Howard said he was asked to take less money due to Downey's rising star, and Howard refused, thus paving the way for Cheadle.
Terrence Howard has had a long and fruitful career, which includes an Oscar nomination for his soulful turn in the rap indie Hustle & Flow, and of course, his dramatic music mogul in the TV series Empire.
Then there was the brief moment when he was part of the Marvel Comics Universe, playing Col.
Through the Harry Potter series, young actor Jamie Waylett played Crabbe, one of Draco Malfoy's trusted flunkies and a big lug who loved to eat loads of cake with his best pal, Goyle.
But in the final installment, the Deathly Hallows: Part 2, Crabbe was noticeably missing from Draco's entourage, replaced by Blaise Zabini (Louis Cordice).
Things started going downhill for the actress, however, in the 1990s.
She had to bow out of playing Vicky Vale in Tim Burton's Batman after injuring herself in a horse-riding accident, and also saw several run-ins with directors and co-stars, including a publicized legal conflict with actor James Woods.
Sometimes a director will rethink a casting for reasons that are completely out the actor's control - just a matter of vision and taste.
Other times, financial negotiations can break down and the actor gets booted out of their role.
It's hard out there for any actor to land stellar roles, even those actors who are well established in Hollywood.