The 44-year-old 'Bridget Jones' Diary' actress is said to have taken a keen interest in the 23-year-old 'Hunger Games' star, reported Contactmusic.
"Renee is obsessed. Ever since Jennifer broke through in (2010 drama) 'Winter's Bone' Renee has been watching her career closely," a source said.
"It sounds crazy but Renee sees a lot of her younger self in Jennifer. She's even trying to restyle herself to fit Jennifer's mould," the source added.