Curve Leicester and National Theatre have both announced extended closures until the autumn.
Theatres across London and the UK closed in March as a result of the ongoing global health crisis.
Both the Curve Leicester and National Theatre have now announced they will not be reopening until autumn at the earliest.
The Curve Leicester will be closed for performances until Saturday 31st October 2020.
They said: "Although we know this is disappointing, we are working hard to ensure our programme of work and community offer is as strong as ever for when we are able to re-open the theatre.
"In the meantime, we are contacting all customers and we ask everyone to be patient at this time and to not contact the Box Office – we promise a member of the team will be in touch."
They added: "Whilst we miss the spirit, connection and feeling of being together in your theatre, we are pleased to have connected with many of you online over the past few months and will continue to do so for the foreseeable future.
"Alongside performances and workshops, we have recently commissioned a number of local artists to create bespoke online content, which we look forward to sharing over the coming weeks.
"Although nothing can ever replace the thrill and pure joy of live theatre, we hope these online initiatives will help keep theatre alive for you and remind you of happy times at Curve."
Meanwhile The National Theatre has cancelled all performances through to August 31.
In a statement they said: "All productions until 31 August have been postponed and we wait, with you, for government advice about how and when we might be able to welcome you back.
"Until we can reopen our doors, we will continue to share work through National Theatre at Home, which streams a much-loved production to your home, for free, every Thursday at 7pm UK-time. And there is more to come.
"We promise that, for however long our building remains closed, we will work tirelessly to ensure that the National Theatre remains an integral part of this nation's lifeblood."