It appears Elon Musk will not be testifying in the Johnny Depp-Amber Heard defamation trial. While Musk has been subpoenaed to hand over any and all communication he had with Heard about the "Pirates of the Caribbean" star, the tech boss will not be taking the stand on Heard's behalf. Musk’s attorney, Alex Spiro, told Fox News Digital Wednesday his client will not testify. During his testimony, Depp claimed he believed the Tesla boss was seeing his ex-wife while Depp and Heard were married. A source with knowledge of the trial also claimed to the New York Post that James Franco, 44, will also be absent from the witness stand. Depp has also claimed Franco and Heard had an affair during Depp and Heard's marriage. Reps for Franco did not immediately respond to Fox News Digital's requests for comment. Elon Musk name-dropped So, how does Musk factor into the Depp-Heard trial? Court documents claim that Heard began a romantic relationship with Musk just one month after the "Aquaman" actress, 35, tied the knot with Depp, 58.