(CNN) -- A Russian Soyuz spacecraft carrying two Russian cosmonauts and one American astronaut successfully docked with the International Space Station on Saturday.
Their arrival at 8:01 p.m. ET -- two days after taking off from Earth -- was precisely one minute ahead of schedule and was described by NASA mission control as "flawless."
Alexander Kaleri, Oleg Skripochka and Scott Kelly will join three other crew members on the space station.
Kelly, a flight engineer, will be joined next year by his twin brother, Mark, marking the first time that siblings have ever been in space simultaneously.