The pop star's reps slam the subpoena for "creating tabloid clickbait instead of focusing on the facts of the case."
The Deadpool star described Jackman as the "best human being I know -- and I have 4 children!"
The director claims the actress used the influence of a "megacelebrity" friend to move her script ideas forward.
The actor attended one of Swift's three shows at NOLA's Caesars Superdome.
The rockers parodied a 'Deadpool' teaser from 2018.
He also shouted out Justin Timberlake, who wasn't in attendance.
The movie, also starring Hugh Jackman, opens in theaters on July 26.
Stray Kids are also contributing an original song titled "Slash" to the upcoming Marvel film, Deadpool & Wolverine
Reynolds and McElhenney dressed up as George Michael and Andrew Ridgeley, respectively.
"I feel like I should remember this," the actor captioned the hilarious image.
