Hobson(l) and Lilley are both products of Bath's academy
Bath second row Scott Hobson and front rower Mark Lilley have renewed their contracts with the Guinness Premiership side for a further two years.
Hobson and Lilley, both 22, have come through the academy at Bath and have featured in the first team this season.
"Scott's development, especially over the past six months, has been exceptional," said coach Steve Meehan.
"Mark has a broad range of talents which make him very valuable to the team and as an individual."
Lilley, who can play at both prop and hooker, added: "I love playing for Bath.
"My Dad used to play here so it is a special place to me and my family and the team are also playing a really exciting style of rugby so I am just really pleased to be part of that.
"When you get offered the chance to play in the first team, you just want to grab it and really go for it."
Hobson has taken the opportunity presented by Danny Grewcock's double ban this season to put in some impressive displays in the LV= Cup and Premiership.
"It has been a challenge to step up to play with the first team, but being able to play alongside the senior guys has been fantastic," said Hobson.
"I have learnt so much from players such as Stuart Hooper and Danny Grewcock and I plan to continue to work hard over the next two seasons so that I can have more chances to wear that first-team jersey."