Llyr (sometimes credited as Jonathan Bryn Llyr) is best known for his work as an on-air personality for Space, Canada's science fiction specialty channel. He first appeared on that network in 1998 on its late-night movie interstitial program, SpaceBar, as the alien barfly and ultimate Star Trek fan, Grot. During the show's final year, Llyr also assumed writing duties, after fellow cast member and head writer Denis McGrath left the series.
After SpaceBar's 2002 cancellation, Llyr transferred to hosting Space's new entertainment news program, HypaSpace. He remained as host until 2005, when he was succeeded by actress Kim Poirier. Llyr stayed on as one of HypaSpace's reporters, and fronted his own weekly segment, "The Scoop", an often tongue-in-cheek look at strange celebrity and science fiction media news items of the week. Llyr also hosted the weekly audio podcast version of HypaSpace.
For several years during his time at Space, Llyr also introduced films on Space's sister station, Drive-In Classics, this time as the character of Drive-In Dick. Again, Llyr had writing duties for these segments.
Llyr was also a founding member of the Toronto, Ontario, based Shakespearean theatre company, The Tempest Theatre Group, (where he played a variety of roles including Hamlet, MacBeth, Marc Antony and Iago among many others) and has appeared in various episodes of the Decoder Ring Theatre  including a number of different roles in The Red Panda Adventures and as the titular character in Deck Gibson, Far Reach Commander.
In 2013 Llyr guested on the televsion show "Nikita" and in 2013/2014 appeared as Mick O'Shea in two episodes of "Murdoch Mysteries."
Llyr also co-wrote the acclaimed middle-grade novel "How To Curse In Hieroglyphics" (2013) with Lesley Livingston. The sequel, "The Haunting of Heck House" will be released in October 2014.