Olive Marie Osmond (born October 13, 1959) is an American singer, actress, television personality, author, and businesswoman. She is known for her girl-next-door image and her decades-long career in many different areas. Her musical career, primarily focused on country music, included a large number of chart singles with four reaching number one on the Billboard Hot Country Songs charts. Her 1973 cover of "Paper Roses," released when she was 14, made her the youngest female act with a number-one country single. Between 1985 and 1986, she also had number-one country singles with "Meet Me in Montana," "There's No Stopping Your Heart,", and "You're Still New to Me." As a television personality, she has been a host of Donny & Marie (alongside brother Donny Osmond) and on The Talk. Her acting career includes appearances in television films and Broadway musicals; she has also written several books and helped found the Children's Miracle Network.

The eighth of nine children in the Osmond family, she made her television debut on The Andy Williams Show. At age 13, she established a career as a country recording artist. She began recording alongside her brother Donny, leading to the creation of their own syndicated variety show, which aired through 1979. In the early 1980s, the Osmond family lost most of its fortune, and Marie performed alongside her siblings. She also attempted to launch an acting career, experimenting with the variety show Marie. She then refocused her attention on the country genre and signed a contract with Capitol Records in 1985. Between 1985 and 1990, she had three number-one singles and released several albums, including There's No Stopping Your Heart (1985).

In the 1990s, Osmond established her own collection of dolls, which the QVC network sold. She made her Broadway debut in The King and I in 1994. Between 1998 and 2000, she reunited professionally with Donny for the network talk show Donny & Marie. During this period, she publicly spoke about her struggles with postpartum depression, later the focus of her book Behind the Smile: My Journey Out of Postpartum Depression. In 2004, she hosted her own radio series, entitled Marie & Friends and, in 2007, appeared in a season of Dancing with the Stars.

She and Donny reunited their act between 2008 and 2019 for a residency at the Flamingo hotel in Las Vegas. The show later produced an album of their duets in 2009. In 2010, she returned with the solo studio album I Can Do This. In 2016, her country album Music Is Medicine followed and then, in 2021, came her classical album, Unexpected. Osmond also co-hosted The Talk between 2019 and 2020. And she appeared in several Lifetime television films, such as The Christmas Edition in 2020.