The duo have joined the Richmond-upon-Thames agency to ‘support the growth of the business', taking its headcount to 25.
Delattre, a French national, previously worked in GCI's London and New York offices for three years. She was formerly at Edelman. At Axon she will work for clients including Novartis and Novo Nordisk.
Dessert's most recent role was at the former Avenue HKM (now Huntsworth Health), where she held the role of programme director and worked for five years.
She will ‘lead new client assignments and support business development focused on UK PR activities'.
Axon managing partner Ralph Sutton said: ‘Our business has more than doubled this year and bringing in talent at this level is critical.'