All the star Scarlets performers will be part of the big event including the region's recently returned internationals such as Jonathan Davies, Martin Roberts, Stephen Jones and Matthew Rees.
Free to everyone, the open training event will be held at Parc y Scarlets next Monday 30th November from 6pm for a 6.30pm start. Free car parking will be open to visitors inside the main stadium with additional spaces in car park B if required.
Supporters will watch from Parc y Scarlets' Castell Howell South Stand as Scarlets coaches Nigel Davies and John Muggleton oversee a crucial session before the region's next big Magners League game.
The Monday evening workout will be followed by a players' poster signing session event, when the training squad will mingle with supporters, sign autographs and pose for pictures.
And captain Mark Jones will be signing autographs along with a number of his team-mates in the Scarlets shop before the session starts from 6pm.
Scarlets Commercial Director, Rupert Moon said: "This is a chance for the whole Scarlets family - fans, players, coaches and Scarlets staff - to get together and enjoy the excitement in the run-up to our next big home game against Edinburgh on December 4th.
"It's a great way for us to say thank you to our loyal supporters by offering them something unique.
"This season at the Scarlets is all about connecting with our supporters and so by opening our doors at special events like this, we hope we're giving everyone another reason to really feel part of our big family."
This only the second time the Scarlets have ever opened their doors during the week, the first open session held last season (March 2009) was such a success, the region has had numerous requests to repeat it.
Scarlets vice-captain David Lyons said: "This should be an interesting insight into how we build-up to key games and will include all the key elements such as lineout drills, backs moves and other important set-piece practice.
"It'll probably be a real eye-opener for many as it's not something that's usually witnessed by most people. Opening up our training is a big thing for the squad and, we hope, our supporters. It's a great way to cement some of the traditional bonds that unite the team with the people that watch week in week out."
Training will end at 7.30pm and players will then stop to meet fans pitch-side.
Scarlets open training session: Monday 30th November 2009. Free entry to all Scarlets supporters. Free car parking inside the stadium. To find out more visit the Scarlets website at www.scarlets.co.uk. The event will open at 6pm for 6.30pm start on the pitch.