
Leisa Gwenllian
Known For & Full Filmography6 Titles

Drama Series - 2026, 16 episodes • as Kath Bevan
Morfa Halen is a tight-knit Welsh town precariously nestled between towering mountains and a fast-encroaching sea that threatens its very existence. As a once-in-a-generation storm begins to gather far out at sea, former detective turned teacher Jackie Ellis discovers the body of her 8-year-old pupil, Cefin, seemingly drowned. The discovery sends shockwaves through the community, reviving the ghost of an unsolved cold case that rocked the town three years prior - the disappearance of Jackie’s niece, Nessa, which cost her career.

Drama Series - 2025, 16 episodes • as Olivia Whitmore
Thrown together by the murder of John's neighbour, John and Janie are an odd, yet hilarious duo with opposing instincts. Every week, they get to the bottom of gripping murders, with various stunning Welsh locations providing a backdrop to their investigations.

Drama Series - 2025, 16 episodes • as Eve Ifanc
In 1995, activist Llyr dies in a bombing; his cousin Rhys is jailed for his murder. In 2025, Rhys returns to buried secrets in a gripping tale of protest, guilt, and generational reckoning. Starring Mark Lewis Jones and Sian Resse-Williams.

Movie - 2026, 2h 15m • as Lois
Jack has been married to Maggie for over half his life. He works as a Hand Raker on the mussel beds in North Wales alongside his younger brother, Dyfan, and Dyfan’s three sons. Jack has always assumed that his own boy, Tom, will join the family business on leaving school but Tom’s resistance to follow in his footsteps creates familial tension. Tensions are further inflamed by the arrival of an itinerant deckhand, Daniel, who makes known his feelings for Jack. In this remote, rural community where life revolves around Church and fishery, Jack is faced with an impossible dilemma. On The Sea is a beautiful, sensual and at times, tragic exploration of masculinity, place and desire.

Movie - 2026, 2h 15m • as Clara
When the flamboyant Henry Paget arrives in 1890s North Wales to claim his aristocratic inheritance, his theatrical flair and defiant eccentricities send shockwaves through the upper-class elite, much to the amusement of the local townspeople. Alongside his spirited cousin, Lily, and loyal butler, Gelert, Henry tries to carve out his own identity as the Fifth Marquess, navigating suffocating traditions, scheming relatives, and the long shadow cast by his estranged father.
