Marjorie Monaghan
American actress
Marjorie Susan Monaghan (born March 19, 1964) is an American former actress best known for her portrayal of Tessa Halloran (aka Number One) in the television series Babylon 5.
Early life
Monaghan was born in Orange County, California and raised in the Midwest. She is of Irish-Celt ancestry and started acting in high school. She graduated cum laude from Miami University in Ohio, then headed to New York where she obtained her first role as a firefighter in the short-lived 1990 TV series H.E.L.P. created by Dick Wolf.
Career
Monaghan has performed in a number of science fiction television roles, including starring as JoJo Thorson in Space Rangers and starring as Freya in the Star Trek: Voyager episode "Heroes and Demons". In 1999 she appeared in all eight episodes of Rescue 77 as Kathleen Ryan.
Monaghan is best known for her appearances in 7 episodes of Babylon 5 as Number One (Tessa Holloran).
Personal life
Monaghan started dating novelist, producer, and screenwriter Grant Rosenberg in 2001 whom she married on February 2, 2011.
This brief starts where responsible research should: with the source description of “Marjorie Monaghan” as american actress. Everything that follows is an evidence route, not borrowed authority.
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The subject matters to the people & ideas register because the source frames it as american actress. Its deeper value depends on whether names, dates, institutions and citations support that framing.
Biographical claims are most persuasive when dates, appointments and relationships can be traced to records created close to the events described. The source revision retrieved here is dated Jul 17, 2026. The linked authority identifier is Q3354503. 2 of 2 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank. The first chronological checks are 1964, 1990, 1999 and 2001.
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This entry incorporates text from “Marjorie Monaghan” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.