And as HELLO! joins the author and wellness expert at her tranquil home in the West Country, she tells us how her new family role - along with finding love with a "younger boyfriend" and self-care including a daily dip in her large freshwater pond - is helping her live life to the full.
"I feel better, stronger and happier than ever before," says Liz, who is joined by elder daughter Lily, 33, and her newborn son, as well as Liz's younger children Brella, 23, and Kit, 21, for this exclusive photoshoot.
Welcoming her first grandchild is "quite a milestone", says Liz, who turned 60 last May and is also mum to Guy, 31, and her 14-year-old youngest son, whom she doesn't name because of his age.
BURSTING WITH PRIDE
"Lily is already an amazing mother; she exudes such calm," says Liz, adding that her new grandson - who was born at the beginning of April and whose name the family are keeping private is a "very content" baby. "I've actually yet to hear him cry. He likes opening one eye and looking at you."
She adds: "It's extraordinary that there are a lot more baby things around now, like breast pumps and apps, than when I first became a mum."
Welcoming a new bundle of joy is all the more poignant given it signifies Lily's triumph in a long and difficult battle with chronic pain due to multiple autoimmune issues, including acute full-body migraine.
"Lily inspires me every day; she's this amazing wellness warrior. She has always talked about never giving up hope and she's living testament to that.
She's now pain-free," her proud mother says. "To see her with a beautiful healthy baby boy in her arms is quite overwhelming."
Watching her "baby" have her own child has been a major moment in Liz's life, and just one of the many reasons she is enjoying, as she puts it, a "better second half".
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