Meghan Markle and Prince Harry have chosen a Mumbai slum foundation, visited by the actress, to be one of seven organisations nominated to receive wedding donations from well-wishers.
The couple have asked those thinking of marking their marriage with a gift to instead give the money to the good causes which cover several issues such as women's empowerment, homelessness and HIV.
Kensington Palace said the couple picked organisations that reflected their shared values and represented a range of issues they were passionate about, but they do not have any formal relationship with the seven organisations.
Markle visited the Myna Mahila Foundation last year, which supports working women in Mumbai's urban slums and aims to breaks taboos around menstrual hygiene.
Writing about her experiences in Time magazine, she said: "97% of the employees of Myna Mahila live and work within the slums, creating a system which, as Nobel Peace prize nominee Dr Jockin Arputham shared with me, is the key to breaking the cycle of poverty and allowing access to education.
"In addition, the women's work opens the dialogue of menstrual hygiene in their homes, liberating them from silent suffering, and equipping their daughters to attend school."
Founder of the Myna Mahila Foundation, Suhani Jalota, said: "Myna Mahila Foundation is delighted to be a part of this special occasion for Ms Meghan Markle and Prince Harry.
"This support will enable us to expand our reach into more urban slums in Mumbai, empowering local women through access to menstrual hygiene products and employment opportunities."
The organisations chosen by the couple include the Children's HIV Association (CHIVA), homeless charity Crisis, and Scotty's Little Soldiers, a charity for bereaved armed forces children.
Harry and Meghan also picked StreetGames, which uses sport to empower young people to kick-start a cycle of positive change in their own lives, Surfers Against Sewage, a national marine conservation and campaigning charity, and the Wilderness Foundation UK, which promotes the benefits and enjoyment of wild nature.