Let's Get It On is the thirteenth studio album by the American soul singer, songwriter, and producer Marvin Gaye. It was released on August 28, 1973, by the Motown subsidiary label Tamla Records on LP.

Recording sessions for the album took place during June 1970 to July 1973 at Hitsville U.S.A. and Golden World Studio in Detroit, and at Hitsville West in Los Angeles. Serving as Gaye's first venture into the funk genre, Let's Get It On also incorporates smooth soul and doo-wop styles alongside sexually suggestive lyrics, leading to one writer's description of it as "one of the most sexually charged albums ever recorded". Gaye infused ideas of spiritual healing in songs about sex and romance, in part as a way of coping with childhood abuses from his father Marvin Gay Sr., which had stunted his sexuality.

Following the breakthrough success of his socially conscious album What's Going On (1971), Let's Get It On helped establish Gaye as a sex icon and broadened his mainstream appeal. It produced three singles—the title track, "Come Get to This", and "You Sure Love to Ball"—that achieved Billboard chart success. Let's Get It On became the most commercially successful album of Gaye's career at Motown, resulting in more creative control being given to him by the label. Its erotic balladry, multi-tracking of Gaye's vocals, and seductive funk sound also influenced later R&B recording artists and producers, with the title track specifically helping pioneer the slow jam and quiet storm formats.

In retrospect, Let's Get It On has been regarded by writers and music critics as a landmark recording in soul. It increased the popularity of funk during the 1970s, while Gaye's smooth-soul sound marked a change from his record label's previous success with the "Motown Sound" formula. Among the most acclaimed LPs in history, it frequently appears on professional rankings of the greatest albums and has been inducted into the Grammy Hall of Fame as a historically important recording. In 2001, it was reissued by Motown as a two-CD deluxe edition release. In 2023, the album was reissued with added material for its 50th anniversary.