The cult programme, about three sibling witches, ended in 2006, but now bosses at American network CBS are planning to bring the show back to life.
However, the project does not have the support of Milano and MCGowan, who have taken to Twitter.com to express their disappointment in a revival being so close to the show's original run.
Milano wrote, "The thing about them doing a Charmed reboot is... it just... it feels like yesterday. It feels too close."
MCGowan, echoed her former colleague's sentiments, adding, "They really are running out of ideas in Hollywood... Lame lame lame lamertons (sic)."
Charmed, which also starred Holly Marie Combs and Shannen Doherty, ran for eight seasons on America's Cw network.