Jenelle Riley Deputy Awards, Features Editor Though many of them weren’t even alive in the 1980s, the cast of “My Best Friend’s Exorcism” said it was a dream come true to recreate the era for their new film. Now streaming on Amazon Prime Video, the horror-comedy held its world premiere Thursday night at the Aero Theatre in Santa Monica as part of the 2022 Beyond Fest Film Festival. The afterparty was held at Pacific Park on the Santa Monica Pier, where guests could play carnival games and feast on funnel cakes and nachos. Based on Grady Hendrix’s novel with a screenplay by Jenna Lamia, “My Best Friend’s Exorcism” is directed by Damon Thomas and centers on best friends Abby (Elsie Fisher) and Gretchen (Amiah Miller), who are struggling with high school when another challenge is thrown their way — Gretchen begins exhibiting signs of demonic possession. In desperation she turns to Christian Lemon (Christopher Lowell), a wannabe evangelist who tours the mall and local schools preaching the word of God and physical fitness.