Brendan Kavanagh

He has performed as Dr. K, often wearing his signature dark hoodie and shades, or sometimes wearing a workman uniform, playing incognito in front of often astonished passersby on public pianos at train stations, airports and other open public venues, mostly around London. His impromptu performances, often weaving together classical, boogie-woogie, Irish and popular themes, are captured and uploaded to his YouTube channel, where he has amassed over 1 million subscribers, making him as of March 2020 the 14,909th most-subscribed channel. He also broadcasts some of his performances directly, via live streaming.

In 2007, Kavanagh founded Dr. K Media Limited and changed his focus to online teaching, selling, performing and promoting piano music, with a strong emphasis on the boogie-woogie style. With the advent of smartphones which allow virtually anyone to capture and disseminate musical performances, he began performing in open public venues.

Brendan Kavanagh (born 1967) also known as "Dr K", is a contemporary British pianist and piano teacher of Irish descent. He specializes in playing and promoting the boogie-woogie genre, almost exclusively improvised, often combined with classical, jazz, blues, rock & roll, and traditional Irish music themes. He regularly performs in open venues on public pianos, sometimes in duet formats with musically inclined passersby or friends. He also plays the piano accordion, with emphasis on traditional Irish tunes.