Ambani was one of the nine celebrities Modi had named to take the clean India campaign forward.
"Wonderful effort by Shri Anil Ambani who cleaned the area around Churchgate Station in Mumbai along with his friends," Modi tweeted.
Anil Ambani today picked up the broom to clean an area outside the railway station and invited ace boxer Mary Kom, super star Amitabh Bachchan and tennis player Sania Mirza to join the initiative.
Launching the campaign, Modi had named Ambani, cricketing icon Sachin Tendulkar and film stars Salman Khan and Priyanka Chopra to take the initiative forward.
The PM had urged the people to nominate nine more people to join the campaign and take the chain forward.
According to another tweet by Modi, others invited by Ambani include columnist Shobha De, journalist Shekhar Gupta, lyricist Prasoon Joshi and Bollywood star Hrithik Roshan.