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HOLLYWOOD, CA - OCTOBER 10: Actor Liam Hemsworth (L) and Miley Cyrus at The World Premiere of Marvel Studios' "Thor: Ragnarok" at the El Capitan Theatre on October 10, 2017 in Hollywood, California. (Photo by Rich Polk/Getty Images for Disney)

HOLLYWOOD, CA - OCTOBER 10:  Actor Liam Hemsworth (L) and Miley Cyrus at The World Premiere of Marvel Studios' "Thor: Ragnarok" at the El Capitan Theatre on October 10, 2017 in Hollywood, California.  (Photo by Rich Polk/Getty Images for Disney)

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HOLLYWOOD, CA - OCTOBER 10: Actor Liam Hemsworth (L) and Miley Cyrus at The World Premiere of Marvel Studios' "Thor: Ragnarok" at the El Capitan Theatre on October 10, 2017 in Hollywood, California. (Photo by Alberto E. Rodriguez/Getty Images for Disney)

HOLLYWOOD, CA - OCTOBER 10:  Actor Liam Hemsworth (L) and Miley Cyrus at The World Premiere of Marvel Studios' "Thor: Ragnarok" at the El Capitan Theatre on October 10, 2017 in Hollywood, California.  (Photo by Alberto E. Rodriguez/Getty Images for Disney)

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HOLLYWOOD, CA - OCTOBER 10: Actor Liam Hemsworth and singer Miley Cyrus arrive at the Los Angeles Premiere "Thor: Ragnarok" on October 10, 2017 in Hollywood, California. (Photo by Jon Kopaloff/FilmMagic)

HOLLYWOOD, CA - OCTOBER 10:  Actor Liam Hemsworth and singer Miley Cyrus arrive at the Los Angeles Premiere "Thor: Ragnarok" on October 10, 2017 in Hollywood, California.  (Photo by Jon Kopaloff/FilmMagic)

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LOS ANGELES, CA - OCTOBER 10: Liam Hemsworth and Miley Cyrus attend the premiere of Disney And Marvel's "Thor: Ragnarok" on October 10, 2017 in Los Angeles, California. (Photo by Todd Williamson/Getty Images)

LOS ANGELES, CA - OCTOBER 10:  Liam Hemsworth and Miley Cyrus attend the premiere of Disney And Marvel's "Thor: Ragnarok" on October 10, 2017 in Los Angeles, California.  (Photo by Todd Williamson/Getty Images)

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HOLLYWOOD, CA - OCTOBER 10: Actor Liam Hemsworth and singer Miley Cyrus arrive at the Los Angeles Premiere "Thor: Ragnarok" on October 10, 2017 in Hollywood, California. (Photo by Jon Kopaloff/FilmMagic)

HOLLYWOOD, CA - OCTOBER 10:  Actor Liam Hemsworth and singer Miley Cyrus arrive at the Los Angeles Premiere "Thor: Ragnarok" on October 10, 2017 in Hollywood, California.  (Photo by Jon Kopaloff/FilmMagic)