Who Plays John Stewart Sr. In ‘Lanterns’? J. Alphonse Nicholson’s Role Explained

‘Lanterns’ has spent its opening weeks digging into the family history behind John Stewart, and much of that story runs through a single supporting performance. J. Alphonse Nicholson plays John Stewart Sr., the father whose own brush with the Green Lantern Corps shapes everything that happens to his son decades later.

The HBO series, produced with Warner Bros. Television and DC Studios, has built its early episodes around this generational thread rather than treating John Stewart Sr. as a footnote. Understanding who Nicholson is and what his character represents helps explain why ‘Lanterns’ has leaned so heavily into this backstory.

J. Alphonse Nicholson’s Casting In ‘Lanterns’

Nicholson’s casting as the younger version of John Stewart Sr. was reported in early 2025, alongside other additions to the ensemble including Poorna Jagannathan, Ulrich Thomsen and Jason Ritter. The series was set up as an eight-episode order produced by HBO in association with Warner Bros. Television and DC Studios.

By the time the show reached its third episode, Nicholson had become a fixture of the cast list alongside a wide ensemble. The ‘Lanterns’ cast also includes Kyle Chandler, Aaron Pierre, Kelly Macdonald, Garret Dillahunt, Poorna Jagannathan, Laura Linney, Jason Ritter, Ulrich Thomsen and Nathan Fillion. The pilot was co-written by Chris Mundy, Damon Lindelof and Tom King, who serve as co-creators on the series.

The character has appeared across multiple episodes rather than a single flashback. In episode 3, additional guest cast members were introduced around the Stewart family, including Cairo Cash Lee as a ten-year-old John, Noah Gibson-Slates as Marcus Stewart and Jaylen Lyndon Hunter as Aaron. That episode centers on the Stewart household during John’s childhood, with Nicholson and Jasmine Cephas Jones playing his parents.

John Stewart Sr.’s Role In The Origin Story

The character of John Stewart Sr. is not a background figure. He is present when his own father is tested by a Green Lantern ring and fails, a moment that sends him into a spiral that convinces those around him that he has lost his grip on reality. That unraveling becomes severe enough that he shoots a television set after a news report about the Green Lantern airs, prompting his wife Bernadette to insist he leave in order to protect their sons.

The fallout from that failed test reshapes the entire family. After the Guardians later visit Bernadette, played by Jasmine Cephas Jones, she resolves to raise her youngest son to become the next Green Lantern in his father’s place. Flashbacks show John Stewart Sr. and Bernadette repeatedly withholding the truth from young John about the Guardians and his status as a potential Green Lantern candidate, while discouraging his artistic interests.

Aaron Pierre, who plays the adult John Stewart, has spoken about how that upbringing left a mark on his character. Pierre described John as carrying an immense amount of trauma that remains unresolved and internalized as a result of his childhood. The show frames John Stewart Sr.’s failure and its aftermath as the root of much of what defines his son as an adult Green Lantern.

J. Alphonse Nicholson’s Career Before ‘Lanterns’

Nicholson’s path to ‘Lanterns’ runs through television and film roles built over more than a decade. Born July 6, 1990, in Greensboro, North Carolina, Nicholson works as an actor, rapper, songwriter and producer, with a career dating back to 2013. He began appearing in local theater productions at PlayMakers Repertory Company before relocating to New York.

His best known role prior to ‘Lanterns’ came on premium cable. Nicholson played the series regular role of Lil’ Murda on Starz’s ‘P-Valley,’ and his other credits include FX’s ‘Clipped,’ Hulu’s ‘White Men Can’t Jump,’ Netflix’s ‘Madam C.J. Walker’ opposite Octavia Spencer, ‘Just Mercy’ starring Michael B. Jordan and Netflix’s ‘They Cloned Tyrone.’ That performance in ‘P-Valley’ brought him two NAACP Image Award nominations for Outstanding Supporting Actor in a Drama Series.

Nicholson has also worked on Broadway. He was featured in ‘A Soldier’s Play,’ which won the Tony Award for Best Revival of a Play. That mix of stage and screen work informed how he approached the emotional demands of playing a father unraveling under pressure in ‘Lanterns.’

How ‘Lanterns’ Approaches John Stewart’s Origins

The creative team behind ‘Lanterns’ has been direct about the intent behind reworking John Stewart’s backstory for the series. Writer Vanessa Baden Kelly discussed the choice to dig deeper into John and Hal as characters, telling TheWrapthat the writers room wanted to push an extra layer beyond the surface version of his history.

Nicholson has echoed that intention in describing his own reaction to the script. He said that as soon as he read it, he knew it was written by a Black woman, adding that she understood him and who he is. Both Nicholson and Jones have said they drew from personal experience preparing for the episode, which required their characters to project zero fear toward their youngest child despite their own private doubts.

Jones has spoken about the weight of the scene in which her husband is passed over for the role. She said that everyone on stage has had a moment of feeling unqualified or overlooked despite being ready, and not seen as an equal. Reception to the approach has been strong so far. ‘Lanterns’ has drawn strong ratings and largely positive reviews since its debut two weeks earlier, according to coverage of the panel discussion around episode three.

The result is a version of John Stewart’s origin that treats his father’s failure as central rather than incidental, giving Nicholson a role with more weight than the description of a young supporting character might suggest. As more of the Stewart family history unfolds, viewers are left to weigh how much of the adult John Stewart’s caution and control traces directly back to what happened to his father, and that is a question worth discussing in the comments.