The Weight Watchers home page currently features a picture of Winfrey with a statement she wrote: "I'm ready. Are you? Come join me."

The former talk show host will make appearances for the company and will also help develop programs and initiatives throughout the five-year partnership.

Shortly after details about the deal were released, the company's shares dramatically increased.

Talk about the Oprah effect!

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Thousands of "No Kings" protesters marched down Courtland Street from the Atlanta Civic Center to Liberty Plaza on Saturday. (Abbey Cutrer/AJC)

Credit: Abbey Cutrer