Surprisingly, though, Will's own daughter Willow Smith passed on playing the main part.
"I just wanted to chill, and be at home, and decompress, and just find out what I wanna do and where I stand on this planet, with the little tiny place we have," Willow said in an interview with V magazine, obtained exclusively by E! News.
"I'm enjoying just being independent and doing my own thing," she explained.
Both Willow and her brother Jaden Smith have already starred in feature films with their famous father, so maybe Willow wants to show the world that she's more than just "Will Smith's daughter."
Either way, it sounds like this 13-year-old is already doing some serious soul-searching. With the level of maturity she's exhibiting, maybe she could star in a remake of 13 Going on 30 instead!