ET spoke with the 'Black Panther' star during San Diego Comic-Con on Saturday.
The CNN host lost his brother in 1988.
The 30-year-old actor also opened up about playing the 'Black Panther' bad guy at San Diego Comic-Con.
Lupita Nyong'o dishes on her movie with Rihanna that started as a Twitter meme.
Click through the gallery to see who made it to SoCal -- and how much fun they're all having!
The lovebirds have birthdays in July.
The 'Thor: Ragnarok' co-stars also opened up about their new movie.
ET caught up with the cast of the HBO show at San Diego Comic-Con on Saturday.
Kim Kardashian and Kanye West Go on Glam Couples Retreat With Khloe, Tristan Thompson and Rachel Roy: Watch!
The latest trailer for 'Thor: Ragnarok' dropped during San Diego Comic-Con over the weekend. The Marvel film hits theaters November 3.
The 20-year-old actor tweeted that he has 'outgrown' Disney Channel.
The 'Fetish' singer celebrated with her 'people' and supported an important cause.
The tennis star's family is growing!
The actor previously credited Ocean for inspiring him post-divorce.
