The former EastEnders actress, 75, said the guitarist, 77, is in good spirits but has been told to rest up.
Sir Brian revealed earlier this month that he had suffered a stroke which left him unable to use his left arm – however he can still play the guitar.
Speaking about Sir Brian’s stroke for the first time at the This Is Icon awards in London on Friday, Lady Anita told The Sun: “He’s been told to rest. It’s hard to keep him resting, but I think he needs to otherwise he won’t get well.
“He’s doing great – he’s on the road, he’s doing really, really well.
“We’re very pleased.
“I’m completely confident that he’ll make a full recovery.
“But, you know, you have to take things slowly, just chill a bit.
“He’s not that kind of animal!”
Referring to Sir Brian’s light-hearted comment saying his blue-lighted ambulance trip was “very exciting”, Lady Anita added: “It’s good to keep a sense of humour, isn’t it, in these cases, difficult though it may be.”
The Queen guitarist has praised staff there for giving him the “most fantastic care”.
Describing his recovery, Brian said he is essentially “grounded” because doctors have told him not to do anything that could raise his heart rate too much.
He continued: “I didn’t want to say anything at the time because I didn’t want anything surrounding, you know. I really don’t want sympathy, please don’t do that because it will clutter up my inbox.
“But the good news is I’m ok and doing what I’m told which is basically nothing, I’m grounded.
“I’m not allowed to go out, drive, get on a plane, I’m not allowed to raise the heart rate too high. But I am good.”
This is not the first health scare the glam rock guitarist has suffered, having survived a heart attack in 2020.
He had been recuperating from a torn muscle and trapped nerve as a result of a gardening injury when he experienced a sudden onset of chest pains.
Brian went on to reveal that doctors discovered he had three arteries congested and he was in danger of blocking the supply of blood to his heart.
Doctors suggested that he undergo open heart surgery, but Brian opted for the alternative which was to have three stents put inside his heart.
