Red Bull says Daniel Ricciardo will join the driving lineup from next season, stepping up from sister team Toro Rosso.

The Australian is replacing compatriot Mark Webber to link up with three-time world champion Sebastian Vettel.

Webber is quitting F1 at the end of the season to race sports cars for German manufacturer Porsche.

Red Bull says Ricciardo has signed a multi-year agreement.

Ricciardo says "since joining F1 in 2011, I hoped this would happen and over time the belief in me has grown."