Now Playing: Amal Clooney brings Vanderbilt graduates to their feet after speech on 'courage'

Now Playing: George Clooney describes how he first met his wife, Amal

Now Playing: Annette Bening on #MeToo, Hollywood and on joining the Marvel universe

Now Playing: Amal Clooney tells Vanderbilt grads: 'We need courage'

Now Playing: Insomniac Theater: 'The Seagull' and 'The Life of the Party'

Now Playing: Inside Meghan Markle's Toronto

Now Playing: Spotify scraps R. Kelly music from its playlists

Now Playing: Candace Cameron Bure: Take It From Me (And Not DJ Tanner)

Now Playing: How John Krasinski went from being a 'scaredy cat' to battling monsters

Now Playing: Georgina Chapman breaks her silence on Harvey Weinstein allegations

Now Playing: 'Avengers' star on landing the life-changing role of Bucky Barnes

Now Playing: Karrueche Tran discusses her new film 'The Honor List' and season 2 of 'Claws'

Now Playing: 'GMA' Hot List: Hugh Jackman sends birthday message to Ryan Reynolds

Now Playing: Former NFL star Rashad Jennings on new book 'The IF In Life'

Now Playing: Laurie Metcalf on whether 'Roseanne' is pro-Trump

Now Playing: Hugh Jackman shares a special birthday message for Ryan Reynolds

Now Playing: Meghan Markle's mom lands in London

Now Playing: Keanu Reeves set to star in 3rd 'Bill and Ted' movie

Now Playing: Kimmel: North Korea detainees 'in for some shock' with Trump meeting

Now Playing: DIY graduation caps are being taken to a whole new level