Nicole Belstler-Boettcher is a German actress and voice actress born in Berlin on March 6, 1963. She is the daughter of the well-known German actress Grit Boettcher, which placed her in an artistic environment from an early age. Before pursuing acting, she studied German literature and art history and completed private acting lessons.

Her on-camera career includes a significant role as Sandra Behrens on the long-running German television series Marienhof from 1995 to 2010, as well as guest appearances on popular shows such as Tatort, SOKO München, and Das Traumschiff. She has also worked as a television host for the music channel VIVA Zwei.

In the field of anime voice acting, Nicole Belstler-Boettcher is best known for her work in the German dub of the long-running series One Piece. She provides the voice for Charlotte Linlin, the fearsome pirate emperor known as Big Mom, a major antagonist in the series. She has voiced this character in the television series and also in the 2022 film One Piece Film: Red. Her other anime voice roles include characters in InuYasha, Amphibia, and Cells at Work! Code Black. Her voice work spans multiple series, with the German synchronization database listing her as having over ten distinct speaking roles.

Regarding recurring collaborations, her extensive work within the One Piece franchise is a notable example, as she voices multiple characters (including Acilia and Bucking) in addition to Big Mom. Beyond anime, she has contributed to German dubs of live-action series such as This Is Us.