Bruno Senna has walked away from Formula One, signing a deal to race for Aston Martin in this year's World Endurance Championship.
Having been dropped by Williams at the end of last season, Senna was linked to a move to either Force India or Caterham.
And although the Force India drive has yet to be decided, the 29-year-old has bowed out, instead signing with Aston Martin.
"It was a great surprise for us," the Brazilian told theCheckeredFlag.co.uk.
"We were looking at different options for to try and achieve for this year and my physio, James Milligan, knows Darren Turner and they spoke maybe 10 days ago, maybe less than that, but we got in touch with the team very quickly and managed to get everything turned around.
"The move came together very, very late and very, very quickly as well. Obviously we were very excited because we could agree to all the terms very quickly and in motor racing it's not always that easy."
Senna will share the #99 with Fred Makoweicki contesting the full Championship while Rob Bell will join them for the Le Mans 24 Hours and the Spa 6 Hours.