Guts is the second studio album by American singer and songwriter Olivia Rodrigo. It was released on September 8, 2023, through Geffen Records. It was written and recorded with Rodrigo working closely alongside Dan Nigro, the producer and multi-instrumentalist of her debut album Sour (2021). Inspired by the period of time immediately following Sour's success, Rodrigo conceived Guts hoping to reflect the process of maturity she experienced toward the end of her teenage years.

A sonically diverse pop record with energetic songs and soft ballads, Guts experiments with rock influences more than its predecessor, using a variety of guitar and drum sounds from alternative and pop rock styles. The subject matter deals with Rodrigo's coming-of-age transition and its tribulations. The album received praise for its lyrical wit, complexity, topicality, aesthetic and energy. Reviews noted both humorous and emotionally fraught lyrics, detailing Rodrigo's struggles with identity, romantic and professional disillusionment, unexpected stardom, and societal expectations as a young woman.

Guts topped album charts in 15 countries, including the United States, Australia, Germany, Spain, Sweden, and the United Kingdom. In its US debut, it recorded 302,000 first-week album-equivalent units while charting all 12 of its songs in the top 40 of the Billboard Hot 100. Three singles were released from the album, including the international number-one track "Vampire", and the top-10 charting "Bad Idea Right?" and "Get Him Back!". The album's deluxe edition, subtitled Spilled, was released on March 22, 2024, along with its lead single "Obsessed". At the 66th Annual Grammy Awards, the album received nominations for Album of the Year and Best Pop Vocal Album, becoming her second consecutive Album of the Year nomination. Two of the album's tracks—"Vampire" and "Ballad of a Homeschooled Girl"—received four further Grammy nominations. In support of the album, Rodrigo embarked on the Guts World Tour in 2024.