I haven't put this one down in "BS", as there are a couple of musical questions.

As usual with my quizzes "PLEASE DON'T POST ANSWERS IN THIS THREAD". Discussions & subtle hints are acceptable, but answers act as spoilers, especially when people spot the quiz over a period of time.
I will post the answers next week on my usual thread.

The title of the quiz is a theme which runs through the quiz, either in the questions, or in the answers.
Enjoy

1        What, colloquially, goes together like a horse & carriage?
2        What term describes someone with the responsibility for the appearance of a horse?
3        Which Mozart work premiered at the Burgtheater in Vienna on 1 May 1786?
4        Which 1991 film (and its sequel) starred Steve Martin, with Martin Short as an effeminate wedding arranger?
5        Who played the title role in "The Bride of Frankenstein"(1935)
6        Which couple get married in the Laurel & Hardy film "Our Wife"(1931)?
7        Which 1954 musical film includes the songs "Goin' Courtin'" & "Spring, Spring, Spring," and ends with a multiple shotgun wedding?
8        What four types of articles is a bride supposed to carry/wear for luck?
9        Who (Characters or actors) end up marrying in "High Society"(1956)?
10        What title was shared by a 1999 Richard Gere film, and a Dr Who Christmas Special(2006)?
11        The middle verse (of three) of which song tells of the marriage of "Jimmy Brown"?   (The Browns, or Edith Piaf)
12        "What expression can refer to:
   ..........a 1673 Restoration comedy by John Dryden
   ..........a series of 18th-century paintings by William Hogarth
   ..........or, a 1921 short story by Katherine Mansfield"
13        Of whose wedding was Sinatra singing when he sang:
"As she knelt where the candle lights were gleaming
It seemed the choir sang soft and low
Farewell, my angel of the lamplight
We'll always love you so"
14        Where was the wedding feast where Jesus turned water into wine?
15        Who were married by "The turkey who lived on the hill"?
16        If the 'wedding supper' will be 'Way down yonder in a hollow tree', who's getting married?
17        In which operetta does Yum-Yum marry Nanki-Poo, and ko-Ko marry Katisha?
18        What term describes those related to you solely through marriage?
19        Who (famously) were married on 29 July 1981?
20        Finally, what was Tammy Wynette's song that got to #12 in UK charts in 1975, but #1 in US Country charts in 1968?