The couple parted ways after struggling to cope with the media interest in their low-key romance, according to sources.
"Jason is a very private person and after it came out that he and Catherine were getting closer together it did affect their relationship," an insider told Glamour.
"There was a lot of pressure on them and it caused them to go their separate ways for a bit but they are still very good friends."
Tate and Orange are believed to have begun dating after filming Comic Relief spoof Fake That last summer.
Comedian John Bishop, who starred alongside Tate in the sketch, later suggested that the Doctor Who actress made the first move.
Watch Catherine Tate and Jason Orange in Fake That below: