Steven Spielberg has always been a father figure to Drew Barrymore, but he actually said no when Barrymore asked him to be her real father during the making of their 1982 classic “E.T. the Extra-Terrestrial.” Barrymore was only 7 years old at the time.
Source: Steven Spielberg Felt Helpless Watching Drew Barrymore on ‘E.T.’ – Variety