"Parents always try to make you versions of themselves. Grow up without those constraints; you can become your own person." - Lucas Luthor, Prodigal

Lucas Luthor is the half-brother of Lex Luthor and the illegitimate son of Lionel Luthor.

Physical Appearance


Lucas Luthor

Lucas had brown hair with dark blonde highlights, which was spiked up. He had gray eyes, and slightly tanned skin. He was clean shaven most of the time.


Lucas is characterized as a volatile sociopath that's willing to do just about anything to secure his own triumph, wealth or safety with no remorse or conscience unlike his half-brother Lex Luthor (at the time).

While trying to win a pick-up basketball game, Lucas intentionally elbowed Clark Kent in the jaw to injure. He also threatened to fire Lana Lang from the Talon simply because he wanted to. While carrying out the kidnapping plan with Lex, he struck Jonathan Kent unconscious. This was probably not part of the original plan as Jonathan took Lex in after he was kicked out of the mansion; it is unlikely that Lex would have agreed to harm him. He was willing to double cross and deceive both Lex and Lionel for financial security from LuthorCorp. However, it seems that Lex's desperation for family intimacy has allowed him to overlook Lucas' transgressions as he decided to protect Lucas in the end.

Early life

Lionel forced Rachel Dunleavy to give him up for adoption. Despite his claim to Lex that Lucas had died, Lionel located him when he was twelve, and continued to keep up with and remained in contact with him. However, Lucas was never officially adopted and grew up in poverty in various foster homes.

Season Two

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Lucas in Edge City.

Lionel told Lex that Lucas was dead, but Lucas was then shown to be alive in the scene where Lionel was looking at the picture of Lucas.

In 2003, Lex found eighteen-year-old Lucas in Edge City after a seven month search. He helped Lucas narrowly escape from some gangsters who went after him after Lucas was discovered to be cheating at a card game.


Lex watches on as Lionel and Lucas reunite.

Lex brought Lucas to LuthorCorp to meet Lionel and to covertly organize a takeover of the company. However, Lucas turned on Lex because Lionel offered Lucas ten million dollars to sign his share away. Thinking he had Lucas under his control, Lionel and Lucas plotted together to take Lex's share of the inheritance and have him thrown out of the Luthor Mansion.

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Lucas at the Talon.

However, Lucas realized that at age eighteen, he was entitled to a much more sizable inheritance than his father was offering. In addition, Lucas still had bitter feelings about what he saw as his abandonment by Lionel. Through observation, Lucas also realized that Lionel was no longer totally blind. Lucas took control of everything that Lex owned, including the Talon.


Lucas tries to force Lionel's hand.

When Lucas was found by one of the gangsters, he was saved by Clark. Lex discovered that Lionel set Lucas up and revealed this information to him. When Lucas kidnapped Lex, Clark discovered Lucas' vicious nature and followed him in an attempt to rescue Lex. In a tense confrontation, Lucas threatened to kill Lionel unless Lionel killed Lex.

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Lucas and Lex.

With help from Clark's heat vision, Lionel got the upper hand and shot Lucas instead, but the gun was filled with blanks. The brothers revealed the kidnapping to be staged; they had plotted together to reveal that Lionel was no longer blind and worked together to restore Lex's position in LuthorCorp. Lex had Lucas placed safely away under his protection. His current whereabouts are unknown.


  • Lucas was thought to be perhaps the last Luthor alive until Tess Mercer was revealed to be a Luthor in Season Ten's Abandoned and when Lex Luthor was brought back to life in Season Ten's Finale, Part 2.
  • Unlike his half-siblings, Lucas has never been cloned (unlike Lex and Julian) nor resurrected (unlike Tess and Lex).
  • Lucas is an original character and doesn't appear in the mainstream DC universe. Pre-Crisis on Infinite Earths, Lex and Lena Luthor did have an unnamed sibling, who was the parent of Supergirl villain Nasthalthia Luthor.


  • Lucas' mother once believed that Clark Kent was Lucas.
  • It is briefly stated he has an affinity with ancient Asian weaponry, but this isn't expanded on other than a throwaway comment on how it's "one thing he has in common" with his father.
  • Lucas Luthor was seemingly forgotten about, after season 2, and never referenced again. In Lucy and Veritas Lex is outright said to have no brother and being Lionel's only son (not counting Julian, who had died as an infant).



→see also Lucas Luthor/Gallery


Luthors in Smallville
Main Lionel LuthorLex LuthorTess Mercer
Earth-2 Earth-2 : Lionel LuthorClark LuthorTess Luthor
Relatives LillianJulianLucasLachlanEliza Luthor
Clones Grant GabrielAdrian CrossLX-13Conner Kent
Ex-Wives Helen BryceDesirée Atkins
Companies LuthorCorpLexCorpDaily PlanetQueen IndustriesPreClox
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