The official weigh in event for UFC on FX 4: "Maynard vs Guida" is set to take place on Thurs., June 21, 2012, LIVE from Ovation Hall inside the Revel Resort & Casino in Atlantic City, New Jersey.

The first fighter is expected to tip the scale at 4 p.m. ET.

As usual, MMAmania.com will provide up-to-the-second coverage of the UFC on FX 4 weigh-ins, as well as provide a detailed recap of the festivities as soon as they conclude.

UFC on FX 4 will feature a lightweight main event of Gray Maynard vs. Clay Guida, as both powerful wrestlers try to scratch and claw their way back into the 155-pound title hunt.

Remember the weigh-in is FREE to attend and open to the public. Doors to the Ovation Hall will open at 1:30 p.m. ET. In addition, UFC Fight Club members will be able to attend a special Q&A session with former UFC Lightweight champion and homegrown "Garden State" product Frankie Edgar at 2 p.m. ET.

Here is the finalized UFC on FX 4 fight card and line up:

Main Event (Five-round, non-title fight):

155 lbs.: Gray Maynard (155) vs. Clay Guida (155)

Main Card (FX Channel):

155 lbs.: Spencer Fisher (156) vs. Sam Stout (155.5)
170 lbs.: Brian Ebersole (170) vs. T.J. Waldburger (170.5)
145 lbs.: Ross Pearson (146) vs. Cub Swanson (145.5)

Preliminary Card (FUEL TV):

145 lbs.: Hatsu Hioki (145.5) vs. Ricardo Lamas (145)
155 lbs.: C.J. Keith (157)** vs. Ramsey Nijem (156)
145 lbs.: Joey Gambino (145) vs. Steven Siler (145.5)
170 lbs.: Rick Story (169.5) vs. Brock Jardine (170.5)
170 lbs.: Luis Ramos (170) vs. Matt Brown (170.5)
185 lbs.: Chris Camozzi (185.5) vs. Nick Catone (185.5)

Preliminary Card (Facebook):

170 lbs.: Ricardo Funch (170.5) vs. Dan Miller (170.5)
135 lbs.: Francisco Rivera (135) vs. Ken Stone (135.5)

MMAmania.com will provide LIVE round-by-round, blow-by-blow coverage of the main card action on fight night (Friday, June 22), which is slated to air at 9 p.m. ET on the FX Channel. The latest quick updates of the live action will begin to flow earlier than that around 6 p.m. ET with the "Prelims" bouts on Facebook/FUEL TV.

For all the latest and greatest news and notes for UFC on FX 4 click here.