BBC One’s Gavin & Stacey was the most watched show on Christmas Day with an incredible 11.6 million viewers, making it the biggest of the decade across all channels (since 2008).
Seven of the top ten shows were featured on BBC One, as audiences turned to the channel throughout the day and delivered the top seven shows across the day, and eight out of the top ten most popular shows.
Director of BBC Wales Rhodri Talfan Davies tweeted "A remarkable 940,000 people watched #GavinandStacey in Wales last night on @BBCOne (11.5m across UK). Can’t check right now but I think that makes it comfortably the biggest TV audience in Wales of the year - a massive 63% share of all viewing."
When it went on air at 20:30 GMT, half (49.2%) of all TV viewers tuned in.
The episode, written by and starring James Corden and Ruth Jones, revisited Gavin, Stacey, Smithy and Nessa nearly 10 years after they left our screens.
The next most-watched programme was the Queen's Christmas Broadcast, which was screened on BBC One, ITV and Sky and seen by 7.85 million people.
In recent years, The Queen's annual broadcast has become the most-watched TV show, based on the overnight figures which do not include viewers who watch Christmas specials on catch-up services during the rest of the festive period.
Strictly Come Dancing, EastEnders and Michael McIntyre's Big Show - all on BBC One - rounded out this year's top five shows.
Charlotte Moore, Director of BBC Content, says: “Christmas Day on BBC One brought the nation together and entertained them in their millions with the much anticipated return of Gavin & Stacey taking the top spot in 2019, and making it the biggest in a decade. We delivered something for everyone with the seven most popular programmes that cap off an incredible year for BBC One celebrating British talent and creativity.”