The 75-year-old actress, who starred in 1977's "The Spy Who Loved Me" and 1983's "Never Say Never Again," griped on "Good Morning Britain": "The world has gone mad. I'm dressed in black. I am in mourning that we're here to talk about Bond being a woman."
She continued, "He was conceived as a man, Ian Fleming created him as a man."
London-bred Leon added, "He's a fantasy. So many men have wanted to be Bond and women have wanted to be with Bond. How can people fantasize about a woman as Bond? Men aren't going to go for a woman as a killer or an assassin."
Finally, she offered a more practical argument, noting, "Why would the producers change something that's been so successful for years?"
Leon isn't the only Bond girl with those sentiments.
Over the weekend, "GoldenEye" star Pierce Brosnan made headlines when he supported the idea of a female James Bond, but said he didn't think it would happen with the franchise's current producers.
Warning: Spoilers ahead.
Still, the feminist angle may be gaining traction.
The upcoming "No Time to Die," which will be Craig's last appearance as Bond, will reportedly reveal the next agent 007: actress Lashana Lynch.
"There is a pivotal scene at the start of the film where M says 'Come in 007,' and in walks Lashana who is black, beautiful and a woman," a Bond insider previously claimed. "It's a popcorn-dropping moment. Bond is still Bond but he's been replaced as 007 by this stunning woman."