Lucas Desmond Roberts (born July 29, 1975) is a character on the television drama Days of Our Lives played by actor Bryan Dattilo from 1993-2001 and then 2002-present.
- William "Bill" Horton (Father)
- Katherine "Kate" Roberts (Mother)
NOTE: Although Kate claimed in the 1990s that Bill was Lucas' father, no DNA test was ever done. In the 2000s, she admitted that she didn't know whether or not Bill was his father as it could have been one of a number of men.
- Michael "Mike" Horton II (Paternal Half-Brother)
- Jennifer Horton Deveraux (Paternal Half-Sister)
- Austin Reed (Maternal Half-Brother)
- Billie Reed (Maternal Half-Sister)
- Cassie Brady (Maternal Half-Sister)
- Rex Brady (Maternal Half-Brother)
- Philip Kiriakis (Maternal Half-Brother)
- Samantha "Sami" Brady Roberts (Married), 05/07/07-
- Nicole Walker (Divorced), 1999-2002
- Caroline "Carrie" Brady Reed (Annulled), 07/10/2006-10/16/2007
- William "Will" Roberts (Son, with Samantha "Sami" Brady)