Johnny Depp and Amber Heard’s upcoming defamation trial.The long-delayed trial begins next month, with Marvel star Paul Bettany joining Franco and Musk as a witness. Representatives from the Walt Disney company and Warner Bros will also testify.According to Deadline, Franco and Musk are being brought in to testify on behalf of Heard after Depp accused them both of having an affair with his ex-wife.In 2019, Depp launched a defamation lawsuit against Heard, after she wrote a 2018 article in The Washington Post claiming she was a victim of domestic abuse.Depp and Heard will testify in person, per Bloomberg.