Landry confirmed the homecoming by posting a social media video Friday with highlights of himself and the team, and the Saints tweeted a video Sunday of the wide receiver signing his contract.
"HOME !!! WHO DAT NATION SEE YOU SOON," Landry wrote in an Instagram post.
The Saints finished last in the NFL in passing yards in 2021 because of a barrage of injuries. Wide receiver Michael Thomas missed the entire season with an ankle injury, while quarterback Jameis Winston missed the final 10 games with a torn ACL.
Landry, 29, has 688 receptions for 7,598 yards and 37 touchdowns in eight seasons with the Miami Dolphins and Cleveland Browns. The 5-foot-11, 196-pound receiver is likely to line up primarily in the slot, as he has through most of his career.
The Saints have made their two biggest signings in May after showing some rare spending restraint in the first two months of free agency. They began the year about $75 million over the salary cap, then lost left tackle Terron Armstead and safety Marcus Williams to other teams and safety Malcolm Jenkins to retirement. They signed former New York Jets safety Marcus Maye among other minor additions.
The Browns released Landry on March 14 after the sides couldn't agree to a restructured contract. The Browns had granted Landry permission to try to seek a trade after Cleveland dealt for Dallas Cowboys Pro Bowl wide receiver Amari Cooper.
Landry, 29, struggled last season with a knee sprain suffered in Week 2, an injury that kept him out five weeks. He finished with 52 receptions for 570 yards and four total touchdowns -- all career lows.
ESPN's Jake Trotter contributed to this report.