We are having a small intimate wedding and we will be cutting a slice and taking a bite each as is tradition, as well as for photos. Do you have a wedding co-ordinator who has hired everything for you or have you done it yourselves? If you've got a wedding co-ordinator then you need to ask her the question, but if you don't have a wedding co-ordinator you need to ask your caterers yourself if they will be cutting the cake for you or if you will be cutting it yourself, nowadays this is done after the speeches for photos, where a slice is taken by the bride and groom and then the cake is sliced up later on. Are you doing the cake big enough for both daytime guests and evening guests? as this will also depend on when you cut the cake, if you are just giving cake to the daytime guests then it needs to be cut after the breakfast, so it can be given out before the evening. If you are doing a cake to give to the evening guests then you can cut at your leisure between the daytime and evening.
Oooh sorry ladies, and Laura for turning you discussion into a history lesson but here I go again, had to look up the history of wedding cakes, sorry can't resist looking up the old traditions, just think it's so interesting :))

The contemporary wedding cake has grown out of many traditions. One of the first traditions began in Ancient Rome where bread was broken over the bride’s head to bring good fortune to the couple. In Medieval England cakes were stacked as high as possible for the bride and groom to kiss over, if they successfully kissed over the stack they were guaranteed a prosperous life together. From this the Croquembouche was created. The myth behind this cake tells that a Pastry chef, visiting Medieval England, witnessed their tradition of piling sweet rolls between the bride and groom which they would attempt to kiss over without knocking them all down. The pastry chef then went back to France and piled sweet rolls up into a tower to make the first Croquembouche. The modern croquembouche is still very popular in France however it is common to place the croquembouche tower on a bed of cake and make it one of the top tiers of the wedding cake. This traditional French wedding cake is built from Profiteroles and given a halo of spun sugar.

Traditionally the bride would place a ring inside the couples portion of the cake to symbolise the acceptance of the proposal. During the mid 17th century to the beginning of the 19th century the “bride's pie” was served at most weddings. Guests were expected to have a piece out of politeness, it was considered very rude and bad luck not to eat the bride’s pie. One of the traditions of bride’s pie was to place a glass ring in the middle of the dessert and the maiden who found it would be the next to marry, similar to the modern tradition of catching the Flower bouquet. Bride’s pie eventually developed into the bride’s cake. At this point the dessert was no longer in the form of a pie and was sweeter than its predecessor. The bride cake was traditionally a plum or fruit cake, the myth that eating the pie would bring good luck was still common but the glass ring slowly died out and the catching of the flower bouquet took that meaning. The action of throwing the bouquet has its roots in the Ancient Greek myth of the Apple of Discord. Fruit cakes were a sign of fertility and prosperity which helped them gain popularity because all married men wanted to have plenty of children. The bride’s cake eventually transformed into the modern wedding cake that we know today. In the 1600s two cakes were made, one for the bride and one for the groom. The groom's cake eventually died out and the brides cake turned into the main cake for the event. When the two cake were served together, the groom's cake was typically the darker colored, rich fruit cake and generally much smaller than the bride's cake. The bride’s cake was usually a simple pound cake with white icing because white was a sign of virginity and purity. In the early 19th century, when the bride’s cake’s were becoming more popular , sugar was coincidentally becoming easier to obtain. The more refined and whiter sugars were still very expensive therefore only the wealthy families could afford to have a very pure white frosting, this showed the wealth and the social status of the family. When Queen Victoria used white icing on her cake it gained a new title, royal icing. The modern wedding cake as we know it now originated at the wedding of Prince Leopold, Duke of Albany, in 1882; his wedding cake was the first to actually be completely edible. Pillars between the cake tiers did not begin to appear until about 20 years later. The pillars were very poorly made from broomsticks covered in icing. The tiers represented prosperity and were a status symbol because only wealthy families could afford to include them in the cake. Prince Leopold’s wedding cake was created in separate layers with very dense icing. When the icing hardened the tiers were then stacked; this method had never been used before, and it was a groundbreaking innovation for wedding cakes at the time. Modern wedding cakes still use this method, but because of the size of today’s cakes, internal support is added to each layer in the form of dowels.
There has always been a lot of symbolism associated with the wedding cake. The earliest known sweet wedding cake is known as a Banbury cake, which became popular in 1655. During the Roman era unsweetened barley bread was used as the wedding food and the groom would break the piece of bread in half over the brides head symbolizing “breaking of the bride’s virginal state and the subsequent dominance of the groom over her." One of the most obvious symbolic traditions is the cake’s white color to symbolize virginity and purity. The white color has been attached to wedding ceremonies since the Victorian era when Queen Victoria chose to wear a white wedding dress at her wedding to Prince Albert in 1840. Queen Victoria accentuated an existing symbol, the color white is frequently associated with virginity and purity. The wedding cake was originally known as the brides cake therefore the color white became common because the cake needed to reflect the bride.
The cutting of the cake is a task full of symbolism. The cake was originally intended to be distributed among the guests by only the bride because consuming the cake would ensure fertility. As weddings grew and the number of guests increased this task became a joint venture, the groom needed to help cut the growing cake and distribute it among their guests. Layers of cakes began to pile up and the icing would need to support the weight of the cake making is very difficult for one person to cut. The groom would assist the bride in this process. Once this tradition began the bride and groom would share a piece of cake before distributing it to the guests to symbolize their union and their promise to forever provide for each other