"Peaches en Regalia" is an instrumentaljazz fusion composition by Frank Zappa. It was released on Zappa's album Hot Rats in 1969 and has been recorded many times since. It was also released as a single in 1970, with "Little Umbrellas" as the B-side. Zappa used the piece on many of his tours, often as either the opening or the encore of a show.
"Peaches en Regalia" has been included in the "underground" version of The Real Book, despite being compositionally more complicated than typical jam session tunes. Having a song included in the book has been described "the ultimate insider credential for a jazz composer".
The tune is used as instrumental background music on the BBC London radio programme presented by Danny Baker. It was also the theme tune for the early 1970s BBC2 show One Man's Week.