The actor told ABC News' Eva Pilgrim about gathering several generations of teen idols, including Drew Barrymore, Raven-Symoné and JoJo Siwa, for her documentary, "Child Star."
The South Carolina woman has been in prison for murdering her two sons in 1994. Her ex-husband and others may testify that she needs to remain behind bars.
"Nightline" co-anchor Juju Chang sits with Park to discuss working with best friend Lily Collins and partner Paul Forman on "Emily in Paris," and having a health emergency as season 4 was filming.
Will, Alexandra and Matthew Reeve discuss the strength their mother and stepmother Dana Reeve showed after their father's paralysis. The full story will be told in the upcoming documentary Super/Man.