Lucas Tucci Di Grassi (born 11 August 1984 in São Paulo) is a Brazilian Formula One racing driver. Having finished as runner-up to Timo Glock in the 2007 GP2 Series season, he will be a race driver for new Formula One team Virgin Racing in 2010.

At the end of 2008, Di Grassi tested for the Honda Racing F1 Team alongside fellow Brazilian and GP2 rival Bruno Senna. Honda Racer Jenson Button tested the 2009 Honda and set a time around Circuit de Catalunya. Senna was just 0.3 seconds off and Di Grassi was 0.5 seconds off. Di Grassi was then sent a contract by Renault to join them as a test driver, becoming the third GP2 runner-up to join Renault as a test driver alongside Heikki Kovalainen and fellow Brazilian Nelson Piquet Jr.