Anna Dominique "Nikki" Marquez-Lim Coseteng (born December 18, 1952) is a Filipina actress and politician who served as a senator from 1992 to 2001, and as representative of Quezon City's 3rd district from 1987 to 1992.

She was among the eleven senators who voted against examining the second envelope of evidence against President Joseph Estrada's impeachment trial in January 2001, leading directly to the Second EDSA Revolution.

As a public official, she was a convenor of many conferences which include the National Convention on the Prevention of Family Violence, International Association of Women in Radio and Television, Wakasan ang Karahasan Laban sa Kababaihan sa Loob ng Tahanan, Regional Consultations on the Prevention of Family Violence, Sisterhood is Global: Dialogues in the Philippines, Advocates for the Study and Ratification of the Constitution, and the Legislators' Dialogue on International Standards.

She was also the recipient of numerous awards, such as the Gawad Maria Clara Trophy – A Symbol of Filipina Womanhood in 1990.

Having visited almost more than 2,000 municipalities in the Philippines, she has been an Adopted Daughter of Antique, Nueva Ecija, Prosperidad City in Agusan del Sur, Ivisan in Capiz, Banate in Iloilo, Hilongos, Dagami and Tunga in Leyte and Binalonan in Pangasinan.