Taking the stage minutes before Senator Jeff Sessions from Alabama officially nominated Donald Trump as the party's candidate for president, Harmeet Dhillon led the convention in a Sikh prayer.
After the pledge of allegiance and the national anthem, Ms Dhillon took the stage and explained that it was Sikh custom to wear a headscarf for the traditional prayer.
Ms Dhillon, born in India, delivered the prayer in a mix of Punjabi and English.
"I never thought I'd see the day that would happen," one young attendee told SBS. "Makes me proud of my party actually," he said.
"I think it's great, it shows the Republican Party truly has a big tent, but I'm sure there were a lot of people who might have been unhappy with it," a Texan attendee told SBS.
The selection was unexpected for many in the room, with presumptive nominee Donald Trump making headlines for strong rhetoric on immigration.
His campaign pledges include a promise to build a wall between the USA and Mexico and place a ban on Muslim immigration - policies which many Republicans attending the conventions quietly disagree with.
The Trump campaign appears to be softening its rhetoric on an outright ban, instead referring to the policy 'extreme vetting' on immigrants from certain 'territories'.
