The actress missed the pantomime season for the first time in 17 years to spend this Christmas with her son Nicholai, daughter-in-law Alison and grandson Cash.
She said: "I starred as 'grandmother' in my own Christmas production. It's my best one yet."
Ekland said she had started to appreciate the value of growing old gracefully and regretted the surgery she had done.
She said: "I've realised this is just not me, but it is what it is and you have to live with it. Whatever I did 15 or 20 years ago, I'd never have done now. I turned 50, and you get insecure."
The actress said she wanted to "scream the good news" when she heard she was going to be a grandmother. She said: "As soon as they told me it was OK to announce, I went into full-on 'grandma mode'.
"When I first saw the baby he was so tiny. I thought 'Oh my God, maybe I'll break him'. Within one day, my instincts came back and knew exactly what to do.
"I come around every Saturday at 8am - I have my own keys so I let myself in. I take Cash, and Nic and Alison go back to sleep. I lock myself in his room and speak to him in Swedish. He'll call me 'farmor', which means 'father's mother' in Swedish."
Nicholai, whose father was record producer and film director Lou Adler, said he is learning more about his mother now she is a grandmother.
He said: "Mum always wanted me to sit up straight, smile and be respectful, dress smartly, maybe because we were in the public eye, she was concerned how we appeared to the outside world, but she always cared about me."