Short answer: Chris Pratt is related to the Kennedy family by marriage — he is the husband of Katherine Schwarzenegger, whose maternal family includes members of the Kennedy clan, which makes Pratt an in‑law to some Kennedys (including a distant connection to Robert F. Kennedy Jr.).

How they're connected

  • Katherine Schwarzenegger is the daughter of Maria Shriver, who is a niece of John F. Kennedy (through the Kennedy–Onassis family).
  • When Pratt married Katherine Schwarzenegger in 2019, he became part of that extended family network by marriage, not by blood.
  • Because the tie is through Katherine’s maternal side, Pratt’s relationship to prominent Kennedys (for example Robert F. Kennedy Jr.) is an affinity (in‑law) connection rather than a genealogical one.

Context and common confusion

  • Press coverage often phrases this as “married into the Kennedy family,” which is accurate but can sound closer than the relationship actually is; many articles clarify the link is through Katherine’s lineage and therefore by marriage.
  • Public interest rose when Pratt commented sympathetically about Robert F. Kennedy Jr. at various media appearances, which led outlets to remind readers of the family connection created by Pratt’s marriage.

Brief timeline/example

  1. Katherine Schwarzenegger — daughter of Maria Shriver (a member of the extended Kennedy family).
  1. Chris Pratt married Katherine in 2019, joining her extended family by marriage.
  2. Media stories since then have described Pratt as an in‑law to certain Kennedys, especially when reporting on family gatherings or comments about relatives.

Summary (one sentence)
Chris Pratt is related to the Kennedys by marriage: he is the husband of Katherine Schwarzenegger, whose maternal family includes members of the Kennedy dynasty, making Pratt an in‑law rather than a blood relative.

Bottom note: Information gathered from public reporting and family‑history coverage available online.