diff --git a/AUTHORS b/AUTHORS
index 1ca2018..facbd2e 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -14,4 +14,5 @@ Patches and Suggestions
 - Josh Ourisman
 - Luca Beltrame
 - Benjamin Wohlwend
-- Erik Youngren
\ No newline at end of file
+- Erik Youngren
+- Mark Rogers
\ No newline at end of file
diff --git a/setup.py b/setup.py
index bb7ef54..850f915 100644
--- a/setup.py
+++ b/setup.py
@@ -33,6 +33,7 @@ setup(
         'tablib', 'tablib.formats',
         'tablib.packages',
         'tablib.packages.xlwt',
+        'tablib.packages.openpyxl',
         'tablib.packages.yaml',
         'tablib.packages.unicodecsv'
     ],
diff --git a/tablib/core.py b/tablib/core.py
index 71f4f71..348b88f 100644
--- a/tablib/core.py
+++ b/tablib/core.py
@@ -392,6 +392,15 @@ class Dataset(object):
 
     @property
     def xlsx():
+        """An Excel Spreadsheet representation of the :class:`Dataset` object, with :ref:`separators`. Cannot be set.
+
+         .. admonition:: Binary Warning
+
+             :class:`Dataset.xlsx` contains binary data, so make sure to write in binary mode::
+
+                with open('output.xlsx', 'wb') as f:
+                    f.write(data.xlsx)'
+        """
         pass
 
 
diff --git a/tablib/core25.py b/tablib/core25.py
index c8352a6..a48fbb9 100644
--- a/tablib/core25.py
+++ b/tablib/core25.py
@@ -392,6 +392,19 @@ class Dataset(object):
         """
         pass
 
+    @property
+    def xlsx():
+        """An Excel Spreadsheet representation of the :class:`Dataset` object, with :ref:`separators`. Cannot be set.
+
+         .. admonition:: Binary Warning
+
+             :class:`Dataset.xlsx` contains binary data, so make sure to write in binary mode::
+
+                with open('output.xlsx', 'wb') as f:
+                    f.write(data.xlsx)'
+        """
+        pass
+
 
     @property
     def csv():
diff --git a/tablib/formats/_xlsx.py b/tablib/formats/_xlsx.py
index 92e33f9..1a0713b 100644
--- a/tablib/formats/_xlsx.py
+++ b/tablib/formats/_xlsx.py
@@ -7,30 +7,20 @@ import sys
 
 
 if sys.version_info[0] > 2:
-    from io import BytesIO
-    import tablib.packages.xlwt3 as xlwt
-    
+    from io import BytesIO    
 else:
     from cStringIO import StringIO as BytesIO
-    import tablib.packages.xlwt as xlwt
 
 from tablib.packages.openpyxl.workbook import Workbook
 from tablib.packages.openpyxl.writer.excel import ExcelWriter
 
 from tablib.packages.openpyxl.cell import get_column_letter    
 
-
-
 title = 'xlsx'
 extentions = ('xlsx',)
 
-# special styles
-#wrap = xlwt.easyxf("alignment: wrap on")
-#bold = xlwt.easyxf("font: bold on")
-
-
 def export_set(dataset):
-    """Returns XLS representation of Dataset."""
+    """Returns XLSX representation of Dataset."""
 
     wb = Workbook()
     ws = wb.worksheets[0]
@@ -44,19 +34,19 @@ def export_set(dataset):
 
 
 def export_book(databook):
-    """Returns XLS representation of DataBook."""
+    """Returns XLSX representation of DataBook."""
 
     wb = Workbook()
     ew = ExcelWriter(workbook = wb)
     for i, dset in enumerate(databook._datasets):
-        ws = wb.add_sheet()
+        ws = wb.create_sheet()
         ws.title = dset.title if dset.title else 'Sheet%s' % (i)
 
         dset_sheet(dset, ws)
 
 
     stream = BytesIO()
-    ew.save(filename='test.xlsx')
+    ew.save(stream)
     return stream.getvalue()
 
 
@@ -75,30 +65,33 @@ def dset_sheet(dataset, ws):
 
             # bold headers
             if (row_number == 1) and dataset.headers:
-                ws.cell('%s%s'%(col_idx, row_number)).value = '%s' % col
-                #ws.write(i, j, col, bold)
-
-                # frozen header row
-                #ws.panes_frozen = True
-                #ws.horz_split_pos = 1
+                ws.cell('%s%s'%(col_idx, row_number)).value = unicode(
+                    '%s' % col, errors='ignore')
+                style = ws.get_style('%s%s' % (col_idx, row_number))
+                style.font.bold = True
+                ws.freeze_panes = '%s%s' % (col_idx, row_number)
 
 
             # bold separators
             elif len(row) < dataset.width:
-                ws.cell('%s%s'%(col_idx, row_number)).value = '%s' % col
-                #ws.write(i, j, col, bold)
+                ws.cell('%s%s'%(col_idx, row_number)).value = unicode(
+                    '%s' % col, errors='ignore')
+                style = ws.get_style('%s%s' % (col_idx, row_number))
+                style.font.bold = True
 
             # wrap the rest
             else:
                 try:
                     if '\n' in col:
-                        ws.cell('%s%s'%(col_idx, row_number)).value = '%s' % col
-                        #ws.write(i, j, col, wrap)
+                        ws.cell('%s%s'%(col_idx, row_number)).value = unicode(
+                            '%s' % col, errors='ignore')
+                        style = ws.get_style('%s%s' % (col_idx, row_number))
+                        style.alignment.wrap_text
                     else:
-                        ws.cell('%s%s'%(col_idx, row_number)).value = '%s' % col
-                        #ws.write(i, j, col)
+                        ws.cell('%s%s'%(col_idx, row_number)).value = unicode(
+                            '%s' % col, errors='ignore')
                 except TypeError:
-                    ws.cell('%s%s'%(col_idx, row_number)).value = '%s' % col
-                    #ws.write(i, j, col)
+                    ws.cell('%s%s'%(col_idx, row_number)).value = unicode(
+                        '%s' % col, errors='ignore')
 
 
diff --git a/test_tablib.py b/test_tablib.py
index 7791935..4346859 100755
--- a/test_tablib.py
+++ b/test_tablib.py
@@ -222,6 +222,7 @@ class TablibTestCase(unittest.TestCase):
         data.csv
         data.tsv
         data.xls
+        data.xlsx
 
 
     def test_book_export_no_exceptions(self):
@@ -233,6 +234,7 @@ class TablibTestCase(unittest.TestCase):
         book.json
         book.yaml
         book.xls
+        book.xlsx
 
 
     def test_json_import_set(self):