Speaking at yesterday’s TRIC Awards, the star said she had been “trying for ages” before it happened.
“Sam, who plays Bernice, does lucky spells and she did a lucky spell to help me get pregnant,” Sharon told The Sun.
She continued: “I carry it with me as my lucky charm, I always have it on me. The timing was amazing, she does Wicca spells and other magic spells.
“It’s my good luck stone and they obviously work.”
Samantha previously revealed last year that she had cast a “love spell” to find her husband, as part of the Wiccan faith.
The star told Lorraine Kelly: “I’ve always been a Wiccan, a white witch, so I cast a love spell before I met Sean [Pritchard] to meet the right person.
“I use candles and crystals in the magic I do. I wrote down exactly what I was after. Then I met Sean and he was exactly what I had written. It’s as if he appeared by magic!”
The star, who first returned to the ITV soap back in 2012, was previously married to
Nick Moore, before they split 14 years ago.
Samantha, who has two children with Sean, was quick to defend herself: “It’s not as bonkers as it sounds.”
Meanwhile, Sharon got very tearful as she announced her pregnancy, revealing that the programme’s Dr Chris Steele had known for a while.
“I’m pregnant. I am probably going to say everything wrong. I am a little bit emotional,” she stated.
This Morning airs weekdays at 10.30am on ITV.