Arne Christer Fuglesang (born March 18, 1957 in Stockholm) is a Swedish physicist and an ESA astronaut. He was launched aboard the STS-116 Shuttle mission on December 10, 2006, at 01:47 GMT, making him the first Swedish citizen in space. Married with three children, he is a Fellow at CERN and taught mathematics at the Royal Institute of Technology before being selected to join the Astronaut Corps of the European Space Agency in 1992. As of 29 August, 2009, he has participated on two Space Shuttle missions, and is projected to be the first Astronaut outside of the United States or Russia to participate in more than three spacewalks.

Christer Fuglesang was born in Stockholm to a Swedish mother and a Norwegian father, who became a Swedish citizen shortly before Fuglesang's birth. Fuglesang received a master of science degree in engineering physics from the Royal Institute of Technology (KTH), in Stockholm in 1981, and received a doctorate in experimental particle physics from Stockholm University in 1987. He became an associate professor (docent) of particle physics at Stockholm University in 1991.

He married Elisabeth (Lisa) Fuglesang (née Walldie) in 1983, whom he met at the Royal Institute of Technology (KTH). They have three children.