Lindsay Lohan -- Liz Taylor Is the Breast Role!!!

While filming a fight scene for her Elizabeth Taylor Lifetime movie "Liz & Dick" in L.A. on Monday, Lindsay Lohan could hardly contain herself ... as she nearly popped out of her dress.

With Grant Bowler playing Richard Burton at her side, Lindsay's acting nearly got the best of her as she almost bared a lot more than her soul.

Hopefully wardrobe malfunctions will be LiLo's only on-set issues.