R WorldMap made interactive in plotly

Hi I have drawn a world Map in R and have plotted specific locations on it (cities) but I want this map to be interactive ie you hover over the cities and the name pops up. I have used plotly for some similar things but I just don't have the time to sit down and work out how to get it to work in plotly so would like someone to help do it for me!
I can provide you the R code I have already.