Nimrat's epistolary romance "The Lunchbox", co-starring actor Irrfan Khan, was in the race in non-English best film category at the 68th edition of the awards. It, however, lost to Polish-Danish drama movie "Ida".
The 32-year-old actress, who turned heads in a pink long gown with batwing sleeves by Georges Hobeika, also presented an award.
She took to Twitter to share her happiness.
"Don't recollect presenting... But apparently I did! That was some room with a view! At the unforgettable BAFTA do last night... So surreal to be there and present as well," she tweeted.