The Toro Rosso motor racing team has named Australian Daniel Ricciardo and Frenchman Jean-Eric Vergne in an all-new 2012 driver line-up after surprisingly ditching the youngsters who took them to eighth place in this year's Formula One championship.
The decision left Switzerland's Sebastien Buemi and Spaniard Jaime Alguersuari looking for a drive with few options remaining.
21-year-old Vergne has tested for Red Bull and took part in Friday practice for Toro Rosso three times this year.
He will be France's third driver on the starting grid, along with Lotus's Romain Grosjean and Marussia's Charles Pic, after the country had none in 2011.
Ricciardo, a Red Bull test and reserve driver, raced for HRT this year and the 22-year-old had been linked to Caterham as a possible replacement for Jarno Trulli despite the Italian having a contract.
The arrival of the pair means Red Bull-owned Toro Rosso will have a completely new lineup for the first time since their debut in 2006.
Perth native Ricciardo took part in Friday practice at grand prix weekends for Toro Rosso before moving to a race seat at HRT in the second half of the year for the final 11 races without scoring a point.
Alguersuari and Buemi were 14th and 15th respectively this season, with 26 and 15 points.
Toro Rosso's announcement left one seat at Williams and one at HRT still to be decided.
Force India have yet to name their lineup but are expected to go with Britain's Paul di Resta and Germany's Nico Hulkenberg.
Germany's Adrian Sutil, Russian Vitaly Petrov and Brazilians Rubens Barrichello and Bruno Senna are among those who raced this season still looking for a seat.