Ajahn Brahm, also known as Ajahn Brahmavamso or Phra Visuddhisamvarathera (born Peter Betts[1] on 7 August 1951), is a British Theravada Buddhist monk. Born in London, he was ordained in the Thai Theravada tradition at the age of twenty-three. He currently resides in Australia, where he is the abbot of the Bodhinyana Monastery. He is the author of sereral books on Buddhism and meditation.

Ajahn Brahm is also the Spiritual Director of the Buddhist Society of Western Australia, Spiritual Adviser to the Buddhist Society of Victoria, Spiritual Adviser to the Buddhist Society of South Australia, Spiritual Patron of the Buddhist Fellowship in Singapore, Patron of the Brahm Centre in Singapore, Spiritual Patron of the Bodhikusuma Centre in Sydney, and most recently, Spiritual Adviser to the Anukampa Bhikkhuni Project in the UK.