Giselli Monteiro (born 16 November 1988) is a Brazilian model and Bollywood actress. She made her film-debut playing the role of "Harleen Kaur" in the 2009 Bollywood film Love Aaj Kal, directed by Imtiaz Ali.
Monteiro was born in Espirito Santo, Brazil. She started her modeling career at the age of seventeen and has travelled to Italy, Germany, France, Greece, Hong Kong, Singapore, Thailand and Philippines. She came to Mumbai, India in 2008. She began her acting career in Bollywood, portraying the role of the old-fashioned Punjabi girl, Harleen Kaur, in Imtiaz Ali's Love Aaj Kal which also stars Saif Ali Khan and Deepika Padukone. She was purposely kept under wraps during the film's promotion. Following the film's release, her identity was revealed, and it was also revealed that she had approached Ali through designer Anaita Shroff Adajania to audition for the role of Jo, Saif Ali Khan's Caucasian girlfriend in the second half of the film, but, on his wife's suggestion Ali took her for Harleen's part, especially since he had not been able to cast for that role despite auditioning girls from all over India. She was featured on the covers of Indian edition of Harpers Bazaar, ELLE, Marie Clarie and Femina.