She has been married to Eddie Kulukundis, since 1981.
She was married to Pierre Granier Deferre from 1967-1974, when they divorced.
In the 1970s, Susan dated actor Nicky Henson.
Because of Susan's dyslexia, she can't learn her lines easily, so therefore her lines are recorded onto tape and played back to her.
She was made an OBE (Officer of the Order of the British Empire) in 1995, for her work as a campaigner for dyslexia issues.
She is a campaigner in the UK on issues involving dyslexia.
She released an autobiography called: "Susan's Story", which was when people learned of her struggle with dyslexia.
She was diagnosed with dyslexia.
Susan: ... there's no better part than a nasty person. After Fleur, I played a whole series of them: Sarah, Duchess of Marlborough, was in her own way a monster, Becky Sharp was also a monster, and in the theatre I've played a lot of monsters, but for some reason people only ever remember me playing these sweet simpering girls who wouldn't say boo to a goose. It must be something about my personality which is deceiving people!
Susan: I went to do a fete the other day and all the under tens called me Molly (from "Monarch of the Glen"). And sometimes children call me 'Susan Hamster' which I love - it's so sweet isn't it?
Susan: I can't think it's satisfying for a woman to be a ballbreaker, and it must be dreadful for the man.
Susan: Colour TV was incredible. You would turn it on just to look at a tree. It was so exciting to see it not in black and white.
Susan: The Barchester Chronicles I just thought was exquisitely cast, acted and directed and I was very proud to be involved in it. In fact, I've enjoyed all the television series I've done for the BBC anyway. I haven't done any for any other stations!
Susan: The Forsyte Saga really swept the country as eventually it swept the entire world. It was a huge success in Russia as it was everywhere else. They changed the times of church services and there were things about The Forsyte Saga all the time. All I know is that we all had our careers catapulted into great prominence and those in the series who were already big stars received a great boost.
Susan: Most of my work was with Eric Porter and Martin Jarvis, whom I not only admired but had a very, very good working relationship with indeed. It was a great joy, a great, great pleasure and I just wish certain other parts of my working life had been so joyful. I had hardly anything to do with Nyree Dawn Porter and Kenneth More, just two tiny scenes...
Susan: I started off my work in theatre, in repertory in Bognor Regis, then I went to Oxford Playhouse. After that I may have gone straight to the Art Theatre, then I probably did a musical called Expresso Bongo with Paul Schofield. After that I don't know. What I did was one of those very important television plays. When that was shown I was whisked off to America pretty well three days later, then I came back to do Andromeda.