worksheet.Cells["A1"].SetHyperlink(worksheet.Cells["G12"], "Link to cell G12..");
worksheet.Cells["A2"].Hyperlink = new Uri("https://epplussoftware.com", UriKind.Absolute);

var hyperLink = new ExcelHyperLink("https://samples.epplussoftware.com/HtmlExport/", UriKind.Absolute);
hyperLink.Display = "EPPlus HTML Export Sample Website...";
hyperLink.ToolTip = "Follow this link to the EPPlus HTML Export sample website";
worksheet.Cells["A3"].Hyperlink = hyperLink;

var namedStyle = package.Workbook.Styles.CreateNamedStyle("HyperLink");
namedStyle.BuildInId = 8; //This is the id for the build in hyper link style.

var namedStyle = package.Workbook.Styles.CreateNamedStyle("Followed HyperLink");
namedStyle.BuildInId 
You can also add a style for followed hyperlinks:
```C#
var namedStyle = package.Workbook.Styles.CreateNamedStyle("Followed HyperLink");
namedStyle.BuildInId = 9; //This is the id for the build in followed hyper link style.

worksheet.Cells["A1:A3"].StyleName = "HyperLink";

worksheet.Cells["A1:A3"].StyleName = "HyperLink";

//Add a drawing with a HyperLink to the statistics sheet.
//We add the hyperlink as a drawing here, as we don't want it to move when we expand and collapse rows.
var hyperLink =ws.Drawings.AddShape("HyperLink", eShapeStyle.Rect);            
hyperLink.Hyperlink = new ExcelHyperLink("Statistics!A1", "Statistics");
hyperLink.SetPosition(13, 0, 9, 0);
hyperLink.SetSize(70, 30);
hyperLink.EditAs = eEditAs.Absolute;
hyperLink.Border.Fill.Style = eFillStyle.NoFill;
hyperLink.Fill.Style = eFillStyle.NoFill;
hyperLink.Text = "Statistics";
hyperLink.Font.UnderLine = eUnderLineType.Single;
hyperLink.Font.Fill.Color = Color.Blue;