TOI-1117 is a Sun-like G-type star (about 0.97 solar masses, 5,635 K, 1.05 solar radii), 168 light-years from Earth. TOI-1117 b is a 8.9-Earth-mass planet, with an orbital period of 2.2 days, at 0.033 AU from its star, and an equilibrium temperature near 1,538 K, discovered in 2025 via transit. TOI-1117 c is a 8.8-Earth-mass planet, with an orbital period of 4.6 days, at 0.053 AU from its star, and an equilibrium temperature near 1,210 K, discovered in 2025 via radial velocity. Mutual gravitational tugs between the planets can slowly reshape their orbits, preserving clues to the system's assembly.