Weir has become the latest player to sign a new contract at Glasgow Warriors, committing to the club until at least 2021.
The scrum-half was the club’s top try scorer during the 2017/18 season, his first season as a professional, and was named Player and Young Player of the Season at the end of year awards dinner.
In his career to date, the 23-year-old has averaged one try in every two Warriors games scoring 15 times in his 30 appearances.
A product of Bell Baxter High and Strathallan Schools, Horne played in the Tennent’s Premiership for Glasgow Hawks spent a season on loan at London Scottish before making his Warriors debut against Ospreys in 2016.
Having worked his way up the Scotland age grades, Horne also spent a year on the HSBC World Rugby Sevens Series circuit and was a member of the Scotland squad that won the London tournament in 2017.
His impressive performances in a sevens shirt earned him a place in the Team Scotland squad for the 2018 Gold Coast Commonwealth Games.
Horne made his full Scotland debut alongside brother Pete against the USA on the 2018 Summer Tour.
He has played four times for his country, scoring two tries.
George Horne said: “I’m absolutely delighted. Glasgow is my first club and I’ve thoroughly enjoyed my first 18 months as a pro.
“It’s all been a bit of a blur to be honest but I’ve loved every second. It’s great to be able to work with Ali (Price) and Nick (Frisby) every day and I’ve learnt so much from Mike Blair too.
“Scotstoun is a great place to come to work every day and I’m excited for the future.”
Glasgow Warriors Head Coach Dave Rennie said: “George is a bit of a freak. In rugby you come across players who have endless stamina and other players who have gas to burn but it’s a rarity that you find a player with both, but George does.
“We’ve been hugely impressed with him. Not just his performances on the pitch but his attitude off of it too and we’re excited to watch him get even better over the next few years.”
Meanwhile Duncan Weir has committed his future to Worcester Warriors by signing a new two-year contract to remain at Sixways.
The Scotland international has been a revelation on the pitch since joining Warriors in the summer and has been key to the club’s strong early-season form.
Weir has made 11 appearances in all competitions for Warriors and has racked up 119 points.
He has been consistent with the boot and the fly-half has a kicking accuracy of almost 91 per cent in the Gallagher Premiership courtesy of 30 successful kicks from 33 attempts.
His last 19 kicks in the Premiership have all sailed through the posts and he is the second top scorer in the league with 87 points.
Weir said: “I have really enjoyed pulling on the Warriors shirt and being out on the pitch so I am delighted to have signed a new contract.
“All the lads welcomed me with open arms when I arrived in the summer and I’ve felt at home from day one.
“These lads are all pulling in the same direction and working hard for each other, and that shows with the way we’ve been playing.
“My aim now is to help us get some more wins and keep pushing up the Premiership table.”
Warriors Director of Rugby Alan Solomons said: “Duncan has shown that he is one of the best fly-halves in the Premiership. He has been a key player for us this season and has given the team real direction.
“His kicking has been superb and the experience he brings to the side has been invaluable so we are delighted to have him on board.”
Weir joined Warriors in the summer after two years with Edinburgh Rugby and previously won the Pro12 with Glasgow Warriors.
He has won 27 caps for Scotland and was part of his country’s set-up during this season’s autumn internationals.
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