Dianna Basso (born 1982 in Toronto, Ontario, Canada) is a Canadian animator and director. She was a director, animation lead and animator for Arc Productions. She was also a director for the television episodes at Jam Filled. She co-directed the nineteenth series with Don Spencer and David Stoten. She subsequently directed the twentieth, twenty-first, twenty-second and the twenty-third series with its standard-length episodes as the sole director. The twenty-third series specials on the other hand were directed by Joey So and Basso co-directed the twenty-fourth series with Ian Cherry whilst Joey So directed the specials from that series as well.
- Series 19 (ten episodes)
- Series 20
- Series 21
- Series 22
- Series 23 (also consulting director on the double-length episode All Tracks Lead to Rome)
- Series 24 (eight episodes; also consulting director on Thomas' Not-So-Lucky Day, Thomas and the Inventor's Workshop and The Inventor's Spectacular Bridge)