Sylvester McCoy came onto the talkRADIO airwaves for a chat with Paul Ross on Friday morning.
The Scottish actor performed as the Seventh Incarnation of the Time Lord on Doctor Who, and has also earned fame for his role as Radagast the Brown in the Hobbit film trilogy.
He shared his views with Paul and newsreader Rachel Jewell on Jodie Whittaker's casting as the newest Doctor.
He said: "Before it happened, I was a bit doubtful because I didn’t think the BBC would take that risk because Doctor Who is a huge cash cow for them.
"I thought they wouldn’t shake it up too much. Now they’ve done it, it’s rather exciting.
"I put out a Facebook and Twitter post to say welcome, and also I’ve said ‘one small step for woman, one giant leap in womankind'."
McCoy also told the story of how he came to be Radagast in the world of Middle-Earth.
"When they were casting Bilbo Baggins in the Lord of the Rings, I was up for it alongside other actors," he told our audience.
“They knew me from way back when, and Peter Jackson is a Doctor Who fan, I discovered he’s got my costume because he collects everything."
Sylvester McCoy is due to appear at London Film and Comic-Con, held at the Olympia exhibition centre this weekend.
Listen to the interview above.