When did Sian Barbara Allen and Richard Thomas date? What we know as The Waltons actress dies at 78

Sian Barbara Allen, most recognized for playing the role of Jenny Pendleton on The Waltons, died at the age of 78 on March 31, 2025. Her role as John-Boy’s love interest in the series paralleled her off-screen romance with actor Richard Thomas. With fans grieving her death, many are rediscovering the history of their relationship and how it was defined both on and off the screen.

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A Love Story That Started on a Horror Movie Set

Sian Barbara Allen and Richard Thomas first crossed paths on the set of the horror film You’ll Like My Mother in 1972. The psychological thriller co-starred Thomas with Patty Duke and Rosemary Murphy, with Allen in a prominent supporting role. While making the film, Allen and Thomas found themselves growing closer and were soon romantically involved off the set.

After the success of You’ll Like My Mother, Allen was cast in The Waltons, the hit TV drama that had already made Thomas a household name. She played Jenny Pendleton, John-Boy Walton’s first love, in two episodes. Their on-screen connection psyched fans out since their off-screen romance was equally true.

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A Relationship Stalled by Career Goals

Their close connection soon turned into a romantic relationship, but Allen and Thomas went their separate ways about a year later. Both were intensely focused on furthering their careers, and with their professional schedules, it was hard to sustain a long-term relationship.

In a 1973 interview, Allen’s mother described Thomas — “a kind and intelligent young man” — as having “a bright future.” She realized that while there existed profound love between the two, both prioritized chasing their dreams over settling down.

Even following their split, the two exes were seen out in public together from time to time. The two attended industry events and social functions together despite no longer being romantically involved, reports from the time state.

“Thought he may include verses inspired by his life with Allen in his forthcoming tome of poetry which is a testament to his brief but meaningful encounter with Allen,” wrote one fan.

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Richard Thomas Marries

Richard Thomas married Alma Gonzales in 1975 after his split from Allen. The couple divorced in 1993 after having four children together. Thomas and Georgiana Bischoff married in 1994, and the couple has been together since.

Sian Barbara Allen, by contrast, exited the spotlight in the 1990s to devote herself to writing. She lived a private life outside of Hollywood and made only rare public appearances in her later years.

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In Memoriam Sian Barbara Allen

Allen’s death is the final chapter for fans of The Waltons and observers of her work on the screen. Though her time in Hollywood was not overly long, her legacy — as a performer and a former flame of Richard Thomas — lives on, leaving fans remembering the beloved episodes of The Waltons that showcased the many heartaches of young love.