Ian McKellen (playing Cogsworth in the movie) shared on Twitter his experience of the first read-through, with the whole cast (though still no mention of Lumière). Another new cast is mentioned though, Hattie Morahan. It is not said which role she'll play.
The reading took place on April 15, which was Emma's (Belle), Luke Evans' (Gaston), and Emma Thompson's (Mrs Potts) birthday.
"Beauty and the Beast" starts! pic.twitter.com/nOZ7Nk0KVf
— Ian McKellen (@IanMcKellen) April 15, 2015
Part mentioning Emma:
But my favourite moment, because it made me weepy, was when Beast's loving arm was places tentatively on Belle's shoulder after their pas de deux. Clearly dancing and singing rehearsals had started before today.