Built 125 years ago, the theatre remains closed to the public.
Campaigners will today lobby the First Minister Carwyn Jones to do more to protect the Welsh language.
Welsh comedian Rob Brydon and classical singer and television presenter Aled Jones are among those named.
The Senedd and the Wales Millennium Centre are playing host to a range of arts-based workshops for young people today.
International experts in a range of disciplines including dance, film and literature are running workshops aimed at encouraging young people into the arts.
The Deputy Presiding Officer, David Melding AM said: "It's good to see our city's iconic cultural venues being taken over by young people to curate, develop and participate in their own arts programmes."
"Let's hope that these programmes will be successful in empowering the young people involved and in showcasing new and emerging Welsh talent on the world stage."
Filmmakers from across the globe have arrived in the capital for the five-day Iris Prize Festival, a Cardiff-based gay and lesbian film festival.
The festival includes new feature films, panel sessions, parties and screenings of all 30 short films competing for the Iris Prize.
Here are clips from the 30 shortlisted films:
15 countries, including India, USA, Australia, Thailand and the UK, are represented in the shortlist for the prize - a £25,000 reward which is the first of its kind to allow the winner to make their own film.
Cardiff filmmaker Jay Bedwani has been shortlisted for his film, My Mother.
The Iris Prize has secured the support of lesbian and gay film festivals from around the world, helping to raise the profile of lesbian and gay cinema on an international platform.
ITV Cymru Wales' Y Byd Ar Bedwar was judged best current affairs programme at last night's British Academy Cymru Awards. Its investigation Marwolaethau Cyffuriau Mon into drugs deaths on Anglesey helped secure the coveted prize.
Michael Douglas thanked his estranged wife Catherine Zeta Jones in his acceptance speech for Best Actor in a miniseries or TV movie at last night's Emmy Awards.
"I want to thank my wife Catherine for her support," the actor said as he accepted the honour for his role in Behind the Candelabra.
The 68-year-old Hollywood star and Welsh-born Zeta-Jones, 43, announced in August that they were "taking some time apart to evaluate and work on their marriage."
A video featuring Cardiff-born actor Ioan Gruffudd advertising a new Welsh university has caused a stir - after it emerged it was shot in England.
The 90-second University of South Wales video depicts the Hornblower and Titanic actor walking through Mendip Hills in Somerset.
It is understood downpours in the Brecon Beacons were behind the decision to change the location.
But the University of South Wales has defended the advert, saying the video has 'a very Welsh flavour with one of Wales' top stars'.
A spokesperson said: "Its message is universal, making people think about how their university choices affect the rest of their lives.
"We are pleased that thousands of people are continuing to watch the advert with overwhelmingly positive feedback for its powerful message. We'd encourage people to watch the video and judge for themselves."
The University of South Wales was formed this year from the merger of the University of Glamorgan and the University of Wales, Newport, with over 33,000 students attending.
A Swansea park made famous by Dylan Thomas is being officially reopened today, after a major restoration.
Work at Cwmdonkin Park, on the doorstep of the poet's childhood home, has been finished in time for the 100th anniversary of the poet's birth, next year.
The £1.39m refurbishment has been funded by the Heritage Lottery Fund, Swansea Council, the Friends of Cwmdonkin Park and the Welsh Government's Sustainable Tourism Project.
A 1930s-style tearoom will be opened, and the Dylan Thomas shelter and drinking fountain restored.
This afternoon's celebrations will feature a performance of Under Milk Wood from local children, poetry workshops, and trade stalls, before an evening concert.
Cllr Nick Bradley, Swansea Council's Cabinet Member for Regeneration, said: "The refurbishment of Cwmdonkin Park in time for the 100th anniversary of Dylan's birth will help celebrate our city's strong links with the world-famous poet.
"It's an especially apt location because of its closeness to Dylan's childhood home and we know he drew inspiration from the park for some of his works.
"The park promises to be a centrepiece of activities to mark the centenary next year when the eyes of the literary world will be on Swansea Bay."
Peter Andre brought the centre of Cwmbran to a bit of a standstill this lunchtime.
The singer and reality TV star was in town on a promotional visit.
Former X Factor contestant Lucie Jones told ITV News she was excited to see the new series start this weekend. She says there's always room for Welsh talent in the show and it's about time there was a Welsh winner.
The announcement that Catherine Zeta-Jones and Michael Douglas are taking a 'break' is dominating many of the front pages today.