Allies and Morrison is an architecture and planning practice based in London. It operates from its own studios in Southwark Street, the RIBA London Building of the Year 2004.

Allies and Morrison has completed projects throughout the UK and is currently undertaking work in Germany, Holland, India, Qatar and the Lebanon.

The practice is formed of two parts, Allies and Morrison Architects and Allies and Morrison Urban Practitioners, the former focused on architecture and design, the latter on planning, masterplanning consultation, conservation and research. On large-scale projects, the two sides of the practice combine their respective expertise and experience and work together.

The practice has been shortlisted twice for the Stirling Prize, for the Royal Festival Hall in 2008 and New Court Rothschild Bank with OMA in 2012.