Matthew McConaughey has pulled out of portraying President John F. Kennedy in director Lee Daniels' new movie "The Butler."

The "Sahara" star was handpicked to play the assassinated President opposite Minka Kelly's Jackie Kennedy in the star-studded biopic of White House manservant Eugene Allen, but he has decided the role will be better served by another actor.

He tells movie new website, 24Frames.com, "It's not going to happen for me. It was going to take some good hard work on my part for sure - and it was more than an accent. I’ve done accents before. And you can see, you can tell when it’s just coming out from the neck up."

"When you see it done well, they walk different, they sit different - it’s coming out of their feet. There was a lot of work that I was looking forward to putting in on that. But, for certain true reasons, it’s not going to happen."

The film features Forest Whitaker as the titular butler, who served under eight presidents, and Oprah Winfrey as his wife.