This is big.

We've all known for a while now that Jenelle Evans is a train wreck of Lindsay Lohan proportions, but we didn't know until today that MTV was sick of dealing with it. Here's the skinny:

• MTV appears to be pulling the plug on Teen Mom 2

• The decision to end the show follows several months of erratic, headline-grabbing behavior by loose-cannon star Jenelle Evans

• Since Thanksgiving, Evans has become pregnant again, got married, lost her baby and publicly demanded a divorce

• Insiders say producers are concerned the attention-seeking reality star has become a liability for the show

• A fourth and final season of “Teen Mom 2” has already been filmed, and is expected to air sometime this year

Read the full story here.