Oprah Winfrey Reveals the Secret to Her Weight-Loss Success to Fellow Weight Watchers Members

— -- Oprah Winfrey has lost 30 pounds on Weight Watchers, and, in a phone call with six fellow Weight Watchers members, she revealed her secret: a weight-loss buddy.

That’s right. The 62-year-old media mogul and Weight Watchers ambassador and investor said having a program partner has been crucial to her success. And her weight-loss partner is Stedman Graham, also her life partner.

“He kept asking me what every point was, and I said, ‘Why don't you just join?’” she said on the call, adding, “For me, it's so much better when other people are also counting points.”

“Good Morning America” listened exclusively to Winfrey’s call, where she swapped tips and shared stories with the other Weight Watchers members.

The company is launching the new “Better Together” campaign in which it is encouraging members to bring family members and friends on board.

“I'm excited that other people are bringing in their friends and family members because it's been my philosophy forever, that life is better together,” Winfrey said, adding that she and Graham, 65, helped each other on the plan.

“We do hold each other accountable,” she said.

The other Weight Watchers members had a chance to pose questions to Winfrey.

Kara and Kyle Lowry, who are sisters, said Winfrey is their inspiration. “It was unreal that we got to talk to Oprah,” Kara, 33, said.

“It was fun to know and learn that she's going through the same things that we are, and just being proud of small victories,” Kyle, 30, added.

The Oklahoma natives had been overweight for all their lives, and they had all but given up until they found success with Weight Watchers.

After joining the plan together, the siblings lost a collective 176 pounds over the course of two years. Kara Went from a size 24 to a size 10, and Kyle went from a size 16 to a size 2.

Winfrey bought a 10 percent stake in Weight Watchers in October and also joined the program.