  Galaxy clusters magnify background objects through strong gravitational
lensing. Typical magnifications for lensed galaxies are factors of a few but
can also be as high as tens or hundreds, stretching galaxies into giant arcs.
Individual stars can attain even higher magnifications given fortuitous
alignment with the lensing cluster. Recently, several individual stars at
redshift $z \sim 1 - 1.5$ have been discovered, magnified by factors of
thousands, temporarily boosted by microlensing. Here we report observations of
a more distant and persistent magnified star at redshift $z_{\rm phot} = 6.2
\pm 0.1$, 900 Myr after the Big Bang. This star is magnified by a factor of
thousands by the foreground galaxy cluster lens WHL0137--08 ($z = 0.566$), as
estimated by four independent lens models. Unlike previous lensed stars, the
magnification and observed brightness (AB mag 27.2) have remained roughly
constant over 3.5 years of imaging and follow-up. The delensed absolute UV
magnitude $M_{UV} = -10 \pm 2$ is consistent with a star of mass $M > 50
M_{\odot}$. Confirmation and spectral classification are forthcoming from
approved observations with the James Webb Space Telescope

Astrophysics of Galaxies