Mumbai, Oct 12 (IANS): Bollywood's megastar Amitabh Bachchan was left speechless as good wishes poured in for him on his 73rd birthday. The megastar says he doesn’t have any words to express himself, and is humbled by the love.

Amitabh turned 73 on Sunday, and tinsel town celebrities like Rishi Kapoor, Madhuri Dixit Nene, Karan Johar and Anupam Kher wished him, calling him "the indisputable superstar of the country".

“This is all I can express at the moment...I am too humbled by your love and greetings for the birthday,” Big B tweeted on Monday.

Honoured with Padma Vibhushan, the country's second highest civilian honour, and Knight of the Legion of Honour by France for his exceptional career in the world of cinema, Big B has starred in films like “Deewar”, “Zanjeer”, “Sholay”, “Don”, “Black”, "Agneepath”, “Paa” and “Shamitabh”.

He was last seen on the silver screen in Shoojit Sircar's “Piku”, and will next be seen in Bejoy Nambiar's “Wazir”, which is slated to release on December 4.

The actor will also walk into the small screen with "Aaj Ki Raat Hai Zindagi".