Jackson played a key role in the prequel trilogy and today called on George Lucas to bring his character back in Episode IX.
As the audience cheered at the 40th Anniversary Panel, he said: “Mace Windu is awaiting his return, let’s make it happen.
“All you gotta do is say the word, Kathy!”
He added: “See you soon – on-screen I hope!”
Liam Neeson, who portrayed Qui Gon Jinn, also appeared via a video message and joked about making a return to the series – in a spin-off about Jar Jar Binks.
He quipped: “”I was very honoured to play Qui Gon Jinn in The Phantom Menace.
“I’m actually here on location in the Canadian rockies. Were making a very unofficial movie about Jar Jar Binks.
“Spoiler alert: he did go to the dark side.”
Hayden Christiansen, Ian McDiarmid and Anthony Daniels were among the faces who made appearances at the 40th Anniversary panel, with George Lucas making a surprise stint.
Star Wars Celebration continues all weekend, with The Last Jedi panel set for tomorrow.
Star Wars Episode VIII: The Last Jedi is out on December 15.