Amanda Leigh Moore (born April 10, 1984) is an American singer-songwriter and actress. She rose to fame with her debut single "Candy", which peaked at number 2 in Australia and number 41 on the Billboard Hot 100. Her debut studio album So Real (1999) received a platinum certification from the Recording Industry Association of America (RIAA). The title single from her reissue of So Real, I Wanna Be With You (2000), became Moore's first top thirty song in the US, peaking at 24 on the Hot 100. Moore subsequently released the studio albums Mandy Moore (2001), Coverage (2003), Wild Hope (2007), Amanda Leigh (2009), Silver Landings (2020), and In Real Life (2022). She has sold 10 million albums worldwide.

Moore made her feature film debut in 2001 with a minor voice role in Dr. Dolittle 2, before playing a supporting role in the comedy The Princess Diaries. She received recognition for her starring role in the romantic drama A Walk to Remember (2002). Her subsequent film credits include How to Deal (2003), Chasing Liberty (2004), Saved! (2004), Racing Stripes (2005), Because I Said So (2007), License to Wed (2007), Love, Wedding, Marriage (2011), 47 Meters Down (2017), The Darkest Minds (2018), and Midway (2019). She voiced Rapunzel in the Disney animated musical fantasy film Tangled (2010).

From 2016 to 2022, she starred as Rebecca Pearson in the NBC family drama series This Is Us, receiving nominations for a Golden Globe Award and a Primetime Emmy Award. In 2019, she received a star on the Hollywood Walk of Fame.