Given this paragraph about Outlander, who stars in Outlander?

Outlander is a historical drama television series based on the Outlander novel series by Diana Gabaldon. Developed by Ronald D. Moore, the show premiered on August 9, 2014, on Starz. It stars Caitríona Balfe as Claire Randall, a former Second World War military nurse in Scotland who, in 1945, finds herself transported back in time to 1743. There she encounters, falls in love with and marries a dashing Highland warrior named Jamie Fraser (Sam Heughan), a tacksman of Gabaldon's fictionalized version of Clan Fraser of Lovat. Here, Claire becomes embroiled in the Jacobite rising.

Outlander stars Caitriona Balfe (as Claire Randall).  Her co-start is Sam Heughan (as Jamie Fraser).  It is a Starz TV Series portraying star crossed lovers who meet across time. Claire travels from 1945, back in time to 1743 and encounters: adventure, mystery, and political intrigue of the Jacobite uprising; all the time growing closer and closer to her true love Jamie Fraser. The 2014 (to present) show is based on the Outlander book series written by Diana Gabaldon, originally published in the 1990's.