Kelin Poldy Rivera Kroll (born 1 October 1993) is a Peruvian business manager, entrepreneur, social advocate, model, and beauty pageant titleholder who holds the international crown of World Miss University 2016 and the national crown of Miss Peru 2019.

She works alongside the Programa Integral Nacional para el Bienestar Familiar (INABIF), a Peruvian government institution that fosters children and teenagers that have been abandoned by their families or have suffered from abuse.

[citation needed] Having taken a break from pageants to focus on her studies, she came back in 2016 where she won the national collegiate title of World Miss University Peru 2016 in order to participate at the international level for a third time.

[citation needed] The following year on October 29, 2017, she returned to the country's national pageant (in order to participate in 2018 events) and for the second time finished as 2nd Runner-Up.

On the night of October 20 and cited as a favorite for the title, Rivera went on to become Miss Perú 2019 on her third attempt at the crown at age 26.