The film also stars Indian actress Aditi Rao Hydari and British actress Paige Sandhu, and is based on the life of Princess of Punjab, Sophia Duleep Singh, who was one of the key leaders of UK's suffragette movement, a tireless advocate for the rights of women and children.

The actor visited the Golden Temple on Monday to seek blessings to play a British-Sikh character on screen for the first time. Interestingly, he was spotted sporting long hair and a beard in the video while taking the holy dip.

Sharing his excitement, Prateik said, "It is an honour for me to be part of a film that celebrates the legacy of the grand-daughter of our Sher-e-Punjab - Maharaja Ranjit Singh. I will be playing the role of Rajdeep Singh, a British Sikh living in the 1990s in Southall. The character has given me a chance to understand and get closer to my Punjabi heritage. It is a huge responsibility."

The film is inspired by the research of Peter Bance, the historian who discovered the story of Sophia Duleep Singh, who was the grand-daughter of Maharaja Ranjit Singh, and the goddaughter of Queen Victoria.

'Lioness', certified by the National Film Development Corporation (NFDC) and the British Film Institute (BFI), is being made under the bi-lateral treaty signed by both countries in 2008. The film was launched at the recently concluded Cannes film festival and is written and will be directed by award-winning filmmaker Kajri Babbar.

The film is currently in pre-production and is slated to start shooting by the end of this year in London.