Wicketkeeper Horton and batting allrounder Kellaway will remain at Sophia Gardens until at least the end of 2025 and 2026, respectively
Teenagers Ben Kellaway and Alex Horton have signed new terms with Glamorgan.
Batting allrounder Kellaway has penned a three-year contract extension which will keep him at Sophia Gardens until at least 2026.
The 19-year-old made his first-team debut in all three formats last season, making a particular splash in the One-Day Cup.
In seven List A matches, he scored 195 runs at 32.50, including half-centuries against Worcestershire and Warwickshire, and took a team-leading 13 wickets as Glamorgan finished fourth in Group B.
"I am obviously, really delighted, it has been a really special first year at the club, and I am just really excited to be continuing my journey over the next couple of years," Kellaway said.
Horton has made 11 white-ball appearances for Glamorgan [Harry Trump/Getty Images]
"It was quite surreal last year. The targets I set myself early on have been exceeded pretty well I would say but, there is work to do. Making my debut in each format was the highlight of my whole season.
"I'm looking forward to next year, hopefully getting more opportunities to contribute to the team in 2024."
Horton, meanwhile, has committed to Glamorgan until 2025 after signing a one-year contract extension.
The wicketkeeper, who made his first-team debut in 2022, has featured seven times in the One-Day Cup and four times in the T20 Blast alongside earning 17 caps for England Under-19s.
"I feel really good. It is amazing to sign a new contract with Glamorgan and I am looking forward to seeing what next season holds," said Horton, who signed his first professional contract with the county as a 16-year-old.
"Making a start last season with my first-team debuts and playing in the One-Day Cup was nice, and I am hoping to carry that on next season and play a few more games for my home county."
Director of cricket, Mark Wallace, said: "Ben has already enjoyed some success in his short career at the club and we're delighted that he's re-signed at the club for the next three years. Ben will balance university with his time with us and we look forward to him continuing his development here moving forward.
"It's great news that Alex has re-signed. We are very lucky with the wicketkeepers that we have at the club and we look forward to seeing Alex continue to develop his talent here over the next few years."