Longtime viewers will recall that the original aired on ITV, now the home to period drama rival Downton Abbey.
The two shows could face a showdown this autumn if BBC and ITV decide to challenge one another.
A spokesperson for British broadcaster ITV said Clooney would appear in a sketch, but would not act in a full Christmas episode.
Spice Girl Melanie C was a judge in the ITV Superstar contest.
In the U.K., where Broadchurch originally aired on ITV in the spring, the show was a phenomenon.
As Jay walked out, according an ITV News editor tweeting from the scene, the counsel mouthed to a colleague, “This is such fun.”
When it launches in late spring, however, the ITV, as it will be called, will be a major hit.