The company, which delivers DVDs by mail as well as offering movies and TV shows online, had about 33.4 million paying subscribers in the US by the end of the fourth quarter and expects to add 2.25 million more in the current quarter.
Internationally Netflix ended the fourth quarter with more than 9.7 million paid members, adding about 1.7 million over the quarter. It expects to add another 1.6 million in the current quarter. Netflix said this year it planned to "embark on a substantial European expansion".
Profits for the quarter were $48.4m, up from $7.9m a year earlier. Revenue climbed 24% to $1.18bn, above analyst estimates. Shares soared 15% in after-hours trading."