The Hunger Games star became engaged in a war of words with Joan in December, 2013 after taking aim at the late comedienne's Fashion Police series, accusing show producers of encouraging youngsters to criticise others over their appearance and insisting it should be illegal to call people fat on TV.

Joan responded to the attack on social media, accusing the 25 year old of "arrogance", and claiming Jennifer is regularly seen in airbrushed photoshoots.

Earlier this year (15), Melissa Rivers was invited to play her mother in Joy, Jennifer's new film about entrepreneur Joy Mangano, who found fame after selling her Miracle Mop invention to bosses at shopping channel QVC - on which Joan frequently appeared.

"I wondered if it was going to be uncomfortable," Jennifer recalled on U.S. talk show Watch What Happens: Live on Monday (21Dec15). "I really do love Joan Rivers. She's had such an incredible life and is an unbelievable woman. I just am very opinionated, too."

"I don't think (Joan and I) would have had a beef (dispute) had we met," she continued. "So, I said that to (Melissa), and (was) complimentary of her mum, and kind of got it out of the way immediately. And then it wasn't (uncomfortable) and then she's so nice and great, so I got it out of the way and then we were great."