The actress, best known for playing soap superbitch Kim Tate between 1989 and 1999, said she would "beg" for a role in the Spanish-set serial should it return.
She told Inside Soap: "I'd beg for a role if they brought back Eldorado. I have a house in Spain which is a couple of miles from the old set, so it'd be perfect."
The 49-year-old also hinted that Polly Perkins - who portrayed Trish Valentine - could also reprise her role.
"And my friend Polly Perkins lives just around the corner from me there," King revealed. "She's mad as a box of frogs, and great fun."
The star added: "I'm not sure if the BBC could afford it, but Eldorado would really work now. It's time to bring it back!"
The BBC's new director general George Entwistle is being pressed to revive '90s soap Eldorado by corporation workers.
The show aired three times a week for 156 episodes between 1992 and 1993, before being dropped.
The set in the Costa Del Sol has been left untouched since filming ceased.
Watch footage of Eldorado's last ever episode in the video below: